This page lists 132 electrical bulb & socket parts for the 2015 Audi TT, across 17 part types, covering the 2.0L L4 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2015 Audi TT, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. 46 parts of the 132 listed are Fog / Driving Lamp Bulb (18 parts), Turn Signal Lamp Bulb (15 parts) and Tail Lamp Bulb (13 parts). The other 14 part types cover the remaining 86 parts.
Every part on this page is matched to the 2.0L L4 Turbocharged — the only engine offered in the 2015 Audi TT.
The most listed brands for 2015 Audi TT electrical bulb & socket parts are SYLVANIA (41 parts), HELLA (40 parts) and WAGNER (37 parts), plus 6 more brands. Quality grades include Standard Replacement, Extended Life and LED.
27 parts on this 2015 Audi TT page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including SYLVANIA 921LL (Back Up / Reverse Lamp Bulb) and SYLVANIA 7506LL (Brake Light Bulb). Click any part number to see every vehicle that part fits.
Back Up / Reverse Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | 921LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | View on Amazon |
| HELLA | 921LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
| WAGNER | 921LL | 🇺🇸 US 🇨🇦 CA | Long LifeWedge Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 921ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Popular | 921WLED | 🇺🇸 US 🇨🇦 CA | Ultinon LEDWhite | View on Amazon |
| WAGNER | 921WLED | 🇺🇸 US 🇨🇦 CA | LEDWhite | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 921 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA | 6418 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: SV8.5-8 | View on Amazon |
| HELLA | 7507 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: S8.5d or Socket Type Bulb: BAU15S | View on Amazon |
| SYLVANIA | 921 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.2dWattage: 18.00 W | View on Amazon |
| WAGNER | 921 | 🇺🇸 US 🇨🇦 CA | Bulb Type: T-5 Bulb 5/8 (16mm) DiameterVoltage: 12.800 Volts (Direct Current) | View on Amazon |
This table covers the bulbs in the reverse lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
11 Back Up / Reverse Lamp Bulb parts are listed for the 2015 Audi TT, from HELLA, SYLVANIA, WAGNER and 1 other brand. SYLVANIA 921LL carries the "Popular" badge.
The Extended Life section lists 3 options from SYLVANIA, HELLA and WAGNER — grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. SYLVANIA 921LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section lists 1 option from SYLVANIA — grouped under the catalog's "Extra Bright (improved visibility, but shorter life)" designation — the notes column spells out what sets them apart. SYLVANIA 921ST is listed in this group.
In the LED (instant-on, long life, energy-saving) grade, PHILIPS and WAGNER supply 2 parts: grouped under the catalog's "LED (instant-on, long life, energy-saving)" designation — the notes column spells out what sets them apart. A representative part number is PHILIPS 921WLED.
The Standard Replacement section lists 5 options from HELLA, SYLVANIA and WAGNER — built to original-equipment specification. HELLA 921 is listed in this group.
Brake Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | 7506LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: BA15S | View on Amazon |
| HELLA | 7506ALL | 🇺🇸 US 🇨🇦 CA | IncandescentAmber | View on Amazon |
| HELLA | 7506LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
| WAGNER | 17635LL | 🇺🇸 US 🇨🇦 CA | Long LifeBA15S Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 7506ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Popular | 1156RLED | 🇺🇸 US 🇨🇦 CA | VisionLED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 7506 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: BA15S | View on Amazon |
| HELLA | 7506A | 🇺🇸 US 🇨🇦 CA | IncandescentBulb Diameter: 26.5 mm | View on Amazon |
| HELLA | 7506NA | 🇺🇸 US 🇨🇦 CA | IncandescentNatural Amber | View on Amazon |
| SYLVANIA | 7506 | 🇺🇸 US 🇨🇦 CA | Base Type: BA15SWattage: 25.00 W | View on Amazon |
| WAGNER | 17635 | 🇺🇸 US 🇨🇦 CA | BA15S Base21.000 Watt | View on Amazon |
| WAGNER | 7506L | 🇺🇸 US 🇨🇦 CA | Long LifeBulb Type: T-6 Bulb 3/4 (19mm) Diameter | View on Amazon |
This table covers the bulbs in the stop lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
12 Brake Light Bulb parts are listed for the 2015 Audi TT, from HELLA, SYLVANIA, WAGNER and 1 other brand. SYLVANIA 7506LL carries the "Popular" badge.
The Extended Life section: 4 options from HELLA, SYLVANIA and WAGNER. SYLVANIA 7506LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section: 1 option from SYLVANIA. SYLVANIA 7506ST is listed in this group.
LED (instant-on, long life, energy-saving): 1 part, from PHILIPS. A representative part number is PHILIPS 1156RLED.
The Standard Replacement section: 6 options from HELLA, WAGNER and SYLVANIA. HELLA 7506 is listed in this group.
Door Panel Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 2825LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.5d | View on Amazon |
| WAGNER | 17177LL | 🇺🇸 US 🇨🇦 CA | Long LifeW2.1x9.5d Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 2825ST | 🇺🇸 US 🇨🇦 CA | BlueSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 921LED5K | 🇺🇸 US 🇨🇦 CA | LED Miniature Bulb with Color Temperature of 5000KSocket Type Bulb: SV8.5-8 | View on Amazon |
| SYLVANIA | 2825SL | 🇺🇸 US 🇨🇦 CA | LEDCool White | View on Amazon |
| WAGNER | T10LED | 🇺🇸 US 🇨🇦 CA | Tru View PLUS LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA | 2825BL | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA | 2825 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.5dWattage: 5.00 W | View on Amazon |
| WAGNER | 17177 | 🇺🇸 US 🇨🇦 CA | W2.1x9.5d Base5.000 Watt | View on Amazon |
This table covers the replacement bulbs for the Door Panel Light. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
10 Door Panel Light Bulb parts for the 2015 Audi TT come from 3 brands — SYLVANIA, WAGNER and HELLA. The "Popular" part is HELLA 921LED5K.
Extended Life: 2 parts, from SYLVANIA and WAGNER. A representative part number is SYLVANIA 2825LL.
Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 2825ST.
The LED (instant-on, long life, energy-saving) section: 3 options from HELLA, SYLVANIA and WAGNER. HELLA 921LED5K is listed in this group.
Standard Replacement: 4 parts, from HELLA, SYLVANIA and WAGNER. A representative part number is HELLA 2825.
Fog / Driving Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | H11LL | 🇺🇸 US 🇨🇦 CA | Long Life | View on Amazon |
| HELLA | H11LL | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 | View on Amazon |
| WAGNER | 1255H11LL | 🇺🇸 US 🇨🇦 CA | Long Life | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | H1120 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 | View on Amazon |
| HELLA | H11P50 | 🇺🇸 US 🇨🇦 CA | HalogenPerformance 50+ | View on Amazon |
| SYLVANIA | H11XV | 🇺🇸 US 🇨🇦 CA | Xtra VisionColor Temperature: 3200 KV | View on Amazon |
| SYLVANIA | H11SU | 🇺🇸 US 🇨🇦 CA | Silver Star UltraColor Temperature: 4100 KV | View on Amazon |
| SYLVANIA | H11ST | 🇺🇸 US 🇨🇦 CA | Color Temperature: 4000 KVSilver Star | View on Amazon |
| SYLVANIA | H11SZGP | 🇺🇸 US 🇨🇦 CA | Silver Star zXe GOLDBase Type: PGJ19 | View on Amazon |
| WAGNER | H11BLX | 🇺🇸 US 🇨🇦 CA | BritelitePGJ19-2 Base | View on Amazon |
| WAGNER | H11TVX | 🇺🇸 US 🇨🇦 CA | Truview Plus1.733 Base | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | H11LEDSP | 🇺🇸 US 🇨🇦 CA | LEDBase Type: PGJ19-2 | View on Amazon |
| SYLVANIA | H11LEDHP | 🇺🇸 US 🇨🇦 CA | LED ULTRABase Type: PGJ19-2 | View on Amazon |
| WAGNER | H11LED | 🇺🇸 US 🇨🇦 CA | LED | View on Amazon |
Reduced Glare (for rain, fog, snow, or rural driving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | H11YL | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | H11 | 🇺🇸 US 🇨🇦 CA | Base Type: PGJ19-2 | View on Amazon |
| WAGNER Popular | 1255H11 | 🇺🇸 US 🇨🇦 CA | Bulb Color: Clear | View on Amazon |
| HELLA | H11 | 🇺🇸 US 🇨🇦 CA | HalogenSocket Type Bulb: PGJ19-2 or Socket Type Bulb: PGJY19-2 | View on Amazon |
This table covers the bulbs in the fog and driving lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
18 Fog / Driving Lamp Bulb parts for the 2015 Audi TT come from 3 brands — SYLVANIA, HELLA and WAGNER. The "Popular" part is SYLVANIA H11LL.
Extended Life: 3 parts, from SYLVANIA, HELLA and WAGNER. A representative part number is SYLVANIA H11LL.
Extra Bright (improved visibility, but shorter life): 8 parts, from SYLVANIA, HELLA and WAGNER. A representative part number is HELLA H1120.
The LED (instant-on, long life, energy-saving) section: 3 options from SYLVANIA and WAGNER. SYLVANIA H11LEDSP is listed in this group.
The Reduced Glare (for rain, fog, snow, or rural driving) section lists 1 option from HELLA — grouped under the catalog's "Reduced Glare (for rain, fog, snow, or rural driving)" designation — the notes column spells out what sets them apart. HELLA H11YL is listed in this group.
Standard Replacement: 3 parts, from SYLVANIA, WAGNER and HELLA. A representative part number is SYLVANIA H11.
Fog / Driving Lamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S2611 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalContact Terminal Material: Plastic | View on Amazon |
| WALKER PRODUCTS | 2701120 | 🇺🇸 US 🇨🇦 CA | Terminal Gender: Female | View on Amazon |
| WELLS | 1P3537 | 🇺🇸 US 🇨🇦 CA | TT QuattroUsed with H11 Bulb | View on Amazon |
This table covers the sockets that hold a Fog / Driving Lamp bulb. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket.
3 Fog / Driving Lamp Socket parts for the 2015 Audi TT come from 3 brands — STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and WELLS.
Part numbers include STANDARD MOTOR PRODUCTS S2611, WALKER PRODUCTS 2701120 and WELLS 1P3537.
Glove Box Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 2825LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.5d | View on Amazon |
| WAGNER | 17177LL | 🇺🇸 US 🇨🇦 CA | Long LifeW2.1x9.5d Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 2825ST | 🇺🇸 US 🇨🇦 CA | BlueSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 921LED5K | 🇺🇸 US 🇨🇦 CA | LED Miniature Bulb with Color Temperature of 5000KSocket Type Bulb: SV8.5-8 | View on Amazon |
| SYLVANIA | 2825SL | 🇺🇸 US 🇨🇦 CA | LEDCool White | View on Amazon |
| WAGNER | T10LED | 🇺🇸 US 🇨🇦 CA | Tru View PLUS LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA | 2825BL | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA | 2825 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.5dWattage: 5.00 W | View on Amazon |
| WAGNER | 17177 | 🇺🇸 US 🇨🇦 CA | W2.1x9.5d Base5.000 Watt | View on Amazon |
This table covers the bulbs in the glove-box lamp. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
10 Glove Box Light Bulb parts for the 2015 Audi TT come from 3 brands — SYLVANIA, WAGNER and HELLA. The "Popular" part is HELLA 921LED5K.
Extended Life: 2 parts, from SYLVANIA and WAGNER. A representative part number is SYLVANIA 2825LL.
Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 2825ST.
The LED (instant-on, long life, energy-saving) section: 3 options from HELLA, SYLVANIA and WAGNER. HELLA 921LED5K is listed in this group.
Standard Replacement: 4 parts, from HELLA, SYLVANIA and WAGNER. A representative part number is HELLA 2825.
Headlamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | D1S4300K | 🇺🇸 US 🇨🇦 CA | 4300KSocket Type Bulb: PK32D-2 | View on Amazon |
| HELLA | D1S5000K | 🇺🇸 US 🇨🇦 CA | 5000KSocket Type Bulb: PK32D-2 | View on Amazon |
| SYLVANIA | D1S | 🇺🇸 US 🇨🇦 CA | High Beam and Low BeamTT Quattro | View on Amazon |
| SYLVANIA | D1SSZ | 🇺🇸 US 🇨🇦 CA | Silver Star zXe | View on Amazon |
| WAGNER | D1S | 🇺🇸 US 🇨🇦 CA | with Xenon Gas | View on Amazon |
This table covers the bulbs that light the headlamps. Typical signs include a dark lamp, a flicker over bumps, or a bulb that keeps failing on one side. Avoid touching a halogen capsule. Repeated failure in one socket is usually the socket or ground, not the bulb.
5 Headlamp Bulb parts for the 2015 Audi TT come from 3 brands — HELLA, SYLVANIA and WAGNER. The "Popular" part is HELLA D1S4300K.
Listed part numbers: HELLA D1S4300K, HELLA D1S5000K and SYLVANIA D1S, plus the other parts above.
Headlamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS | S2611 | 🇺🇸 US 🇨🇦 CA | Connector Shape: OvalContact Terminal Material: Plastic | View on Amazon |
| ÜRO PARTS | 6R0973735 | 🇺🇸 US 🇨🇦 CA | TT Quattro10 pin black connector | View on Amazon |
| WALKER PRODUCTS | 2701120 | 🇺🇸 US 🇨🇦 CA | Terminal Gender: Female | View on Amazon |
This table covers the sockets that hold a headlamp bulb in the housing. Typical signs include a flicker over bumps, melted plastic, or a bulb that will not stay seated. Dielectric grease on the contacts slows corrosion. Do not force a bulb into a heat-damaged socket.
3 Headlamp Socket parts for the 2015 Audi TT come from 3 brands — STANDARD MOTOR PRODUCTS, ÜRO PARTS and WALKER PRODUCTS.
Part numbers include STANDARD MOTOR PRODUCTS S2611, ÜRO PARTS 6R0973735 and WALKER PRODUCTS 2701120.
LED Bulb Adapter
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER | CBH8H11H16 | 🇺🇸 US 🇨🇦 CA | For H8 / H11 / H16 Bulb | View on Amazon |
This table covers the LED Bulb adapters.
This group shows a single part: WAGNER CBH8H11H16.
License Plate Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS | DE3423LL | 🇺🇸 US 🇨🇦 CA | Longer Life | View on Amazon |
This table covers the bulbs that light the license plate. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
One part is listed for the 2015 Audi TT — PHILIPS DE3423LL.
Map / Reading Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 2825LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.5d | View on Amazon |
| WAGNER | 17177LL | 🇺🇸 US 🇨🇦 CA | Long LifeW2.1x9.5d Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 2825ST | 🇺🇸 US 🇨🇦 CA | BlueSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 921LED5K | 🇺🇸 US 🇨🇦 CA | LED Miniature Bulb with Color Temperature of 5000KSocket Type Bulb: SV8.5-8 | View on Amazon |
| SYLVANIA | 2825SL | 🇺🇸 US 🇨🇦 CA | LEDCool White | View on Amazon |
| WAGNER | T10LED | 🇺🇸 US 🇨🇦 CA | Tru View PLUS LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA | 2825BL | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA | 2825 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.5dWattage: 5.00 W | View on Amazon |
| WAGNER | 17177 | 🇺🇸 US 🇨🇦 CA | W2.1x9.5d Base5.000 Watt | View on Amazon |
This table covers the bulbs in the map / reading lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
10 Map / Reading Light Bulb parts are listed for the 2015 Audi TT, from SYLVANIA, WAGNER and HELLA. HELLA 921LED5K carries the "Popular" badge.
The Extended Life section: 2 options from SYLVANIA and WAGNER. SYLVANIA 2825LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section: 1 option from SYLVANIA. SYLVANIA 2825ST is listed in this group.
LED (instant-on, long life, energy-saving): 3 parts, from HELLA, SYLVANIA and WAGNER. A representative part number is HELLA 921LED5K.
The Standard Replacement section: 4 options from HELLA, SYLVANIA and WAGNER. HELLA 2825 is listed in this group.
Parking Brake Warning Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK | 7506 | 🇺🇸 US 🇨🇦 CA | Bulb Base Type: BA15SFilament Type: C-6 | View on Amazon |
This table covers the replacement bulbs for the Parking Brake Warning Light. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
One part is listed for the 2015 Audi TT — PEAK 7506.
Step / Courtesy Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK | 2825 | 🇺🇸 US 🇨🇦 CA | Average Rated Life: 750.0 HR | View on Amazon |
This table covers the bulbs in the step and courtesy lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
One part is listed for the 2015 Audi TT — PEAK 2825.
Tail Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 7506ALL | 🇺🇸 US 🇨🇦 CA | IncandescentAmber | View on Amazon |
| HELLA | 7506LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
| SYLVANIA | 7506LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: BA15S | View on Amazon |
| WAGNER | 17635LL | 🇺🇸 US 🇨🇦 CA | Long LifeBA15S Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 7506ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Popular | 1156RLED | 🇺🇸 US 🇨🇦 CA | VisionLED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Popular | 7506 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: BA15S | View on Amazon |
| HELLA | 7506A | 🇺🇸 US 🇨🇦 CA | IncandescentBulb Diameter: 26.5 mm | View on Amazon |
| HELLA | 7506NA | 🇺🇸 US 🇨🇦 CA | IncandescentNatural Amber | View on Amazon |
| SYLVANIA | 7506 | 🇺🇸 US 🇨🇦 CA | Base Type: BA15SWattage: 25.00 W | View on Amazon |
| WAGNER | 17635 | 🇺🇸 US 🇨🇦 CA | BA15S Base21.000 Watt | View on Amazon |
| WAGNER | 7506L | 🇺🇸 US 🇨🇦 CA | Long LifeBulb Type: T-6 Bulb 3/4 (19mm) Diameter | View on Amazon |
This table covers the bulbs in the tail lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
13 Tail Lamp Bulb parts for the 2015 Audi TT come from 4 brands — HELLA, SYLVANIA, WAGNER and 1 other brand. The "Popular" part is PHILIPS 1156RLED.
Extended Life: 4 parts, from HELLA, SYLVANIA and WAGNER. A representative part number is HELLA 7506ALL.
Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 7506ST.
The LED (instant-on, long life, energy-saving) section: 1 option from PHILIPS. PHILIPS 1156RLED is listed in this group.
Standard Replacement: 7 parts, from HELLA, WAGNER and SYLVANIA. A representative part number is HELLA 2825.
Trunk / Cargo Area Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 2825LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.5d | View on Amazon |
| WAGNER | 17177LL | 🇺🇸 US 🇨🇦 CA | Long LifeW2.1x9.5d Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 2825ST | 🇺🇸 US 🇨🇦 CA | BlueSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 921LED5K | 🇺🇸 US 🇨🇦 CA | LED Miniature Bulb with Color Temperature of 5000KSocket Type Bulb: SV8.5-8 | View on Amazon |
| SYLVANIA | 2825SL | 🇺🇸 US 🇨🇦 CA | LEDCool White | View on Amazon |
| WAGNER | T10LED | 🇺🇸 US 🇨🇦 CA | Tru View PLUS LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 2825 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA | 2825BL | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| SYLVANIA | 2825 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.5dWattage: 5.00 W | View on Amazon |
| WAGNER | 17177 | 🇺🇸 US 🇨🇦 CA | W2.1x9.5d Base5.000 Watt | View on Amazon |
This table covers the bulbs in the trunk or cargo-area lamp. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
10 Trunk / Cargo Area Light Bulb parts for the 2015 Audi TT come from 3 brands — SYLVANIA, WAGNER and HELLA. The "Popular" part is HELLA 921LED5K.
Extended Life: 2 parts, from SYLVANIA and WAGNER. A representative part number is SYLVANIA 2825LL.
Extra Bright (improved visibility, but shorter life): 1 part, from SYLVANIA. A representative part number is SYLVANIA 2825ST.
The LED (instant-on, long life, energy-saving) section: 3 options from HELLA, SYLVANIA and WAGNER. HELLA 921LED5K is listed in this group.
Standard Replacement: 4 parts, from HELLA, SYLVANIA and WAGNER. A representative part number is HELLA 2825.
Turn Signal Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular | 921LL | 🇺🇸 US 🇨🇦 CA | Long LifeBase Type: W2.1x9.2d | View on Amazon |
| HELLA | 921LL | 🇺🇸 US 🇨🇦 CA | IncandescentLong Life | View on Amazon |
| SYLVANIA | 921NALL | 🇺🇸 US 🇨🇦 CA | Long LifeAmber | View on Amazon |
| SYLVANIA | 7507LL | 🇺🇸 US 🇨🇦 CA | AmberLong Life | View on Amazon |
| WAGNER | 921LL | 🇺🇸 US 🇨🇦 CA | Long LifeWedge Base | View on Amazon |
| WAGNER | 17638NALL | 🇺🇸 US 🇨🇦 CA | Long LifeNatural Amber | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 921ST | 🇺🇸 US 🇨🇦 CA | Cool WhiteSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER | 921WLED | 🇺🇸 US 🇨🇦 CA | LEDWhite | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 921 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| WAGNER Popular | 921 | 🇺🇸 US 🇨🇦 CA | Bulb Type: T-5 Bulb 5/8 (16mm) DiameterVoltage: 12.800 Volts (Direct Current) | View on Amazon |
| HELLA | 7507 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: S8.5d or Socket Type Bulb: BAU15S | View on Amazon |
| PHILIPS | H21W | 🇺🇸 US 🇨🇦 CA | FrontTT Quattro | View on Amazon |
| SYLVANIA | 7507 | 🇺🇸 US 🇨🇦 CA | FrontTT Quattro | View on Amazon |
| SYLVANIA | 921 | 🇺🇸 US 🇨🇦 CA | Base Type: W2.1x9.2dWattage: 18.00 W | View on Amazon |
| WAGNER | 17638NA | 🇺🇸 US 🇨🇦 CA | Natural AmberBAU15S Base | View on Amazon |
This table covers the bulbs in the turn-signal lamps. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
15 Turn Signal Lamp Bulb parts are listed for the 2015 Audi TT, from SYLVANIA, WAGNER, HELLA and 1 other brand. SYLVANIA 921LL carries the "Popular" badge.
The Extended Life section: 6 options from SYLVANIA, WAGNER and HELLA. SYLVANIA 921LL is listed in this group.
The Extra Bright (improved visibility, but shorter life) section: 1 option from SYLVANIA. SYLVANIA 921ST is listed in this group.
LED (instant-on, long life, energy-saving): 1 part, from WAGNER. A representative part number is WAGNER 921WLED.
The Standard Replacement section: 7 options from HELLA, WAGNER, SYLVANIA and 1 other brand. HELLA 921 is listed in this group.
Vanity Mirror / Sun Visor Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER | 11005LL | 🇺🇸 US 🇨🇦 CA | Long LifeSV8.5 Base | View on Amazon |
HID (intense white light)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS | DE3423LL | 🇺🇸 US 🇨🇦 CA | Longer Life | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 6418LED65K | 🇺🇸 US 🇨🇦 CA | LEDSocket Type Bulb: SV8.5-8 | View on Amazon |
| HELLA | 6418LED5K | 🇺🇸 US 🇨🇦 CA | Socket Type Bulb: SV8.5-8 | View on Amazon |
| WAGNER | 6418WLED | 🇺🇸 US 🇨🇦 CA | LED1.16 Watt | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 6418 | 🇺🇸 US 🇨🇦 CA | IncandescentSocket Type Bulb: SV8.5-8 | View on Amazon |
| WAGNER Popular | 11005 | 🇺🇸 US 🇨🇦 CA | Bulb Type: T-4 Bulb 1/2 (13mm) DiameterSV8.5 Base | View on Amazon |
| WAGNER | 17136 | 🇺🇸 US 🇨🇦 CA | Medium Standard Miniature Lamp | View on Amazon |
This table covers the replacement bulbs for the Vanity Mirror / Sun Visor Light. Typical signs include a dark lamp, flicker, or a bulb that keeps failing in one socket. If the same position keeps failing, replace the socket or repair the ground rather than chasing bulbs.
8 Vanity Mirror / Sun Visor Light Bulb parts for the 2015 Audi TT come from 3 brands — WAGNER, HELLA and PHILIPS. The "Popular" part is HELLA 6418.
Extended Life: 1 part, from WAGNER. A representative part number is WAGNER 11005LL.
In the HID (intense white light) grade, PHILIPS supplies 1 part: grouped under the catalog's "HID (intense white light)" designation — the notes column spells out what sets them apart. A representative part number is PHILIPS DE3423LL.
The LED (instant-on, long life, energy-saving) section: 3 options from HELLA and WAGNER. HELLA 6418LED65K is listed in this group.
Standard Replacement: 3 parts, from WAGNER and HELLA. A representative part number is HELLA 6418.
Part numbers include HELLA 6418, WAGNER 11005LL and PHILIPS DE3423LL, among others listed above.
Buying Electrical Bulb & Socket Parts for a 2015 Audi TT
On this vehicle, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.
- Confirm you have the 2.0L L4 Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Fog / Driving Lamp Bulb and Turn Signal Lamp Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2015 Audi TT?
Our catalog currently lists 132 electrical bulb & socket parts for the 2015 Audi TT across 17 subcategories and 9 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical bulb & socket problems on a 2015 Audi TT?
Common symptoms include a lamp that flickers over bumps, melted or discolored socket plastic, or bulbs that keep failing early on one side. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace bulbs in pairs so both sides age together, and put a smear of dielectric grease on the new socket contacts.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2015 Audi TT was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2015 Audi TT?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then repeated bulb failure in one position usually means a socket or ground problem, not bad bulbs — replace the socket rather than chase it. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2015 Audi TT
Electrical Bulb & Socket Parts for Other Audi TT Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.