The 2018 Audi TT has 38 electrical bulb & socket parts with verified fitment on this page — 8 part types and 9 brands, covering all 3 engine options (1.8L L4 Turbocharged, 2.0L L4 Turbocharged and 2.5L L5 Turbocharged). Each part includes a manufacturer part number and application notes.
The bulb and socket system on the 2018 Audi TT covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. The largest groups are Door Panel Light Bulb (10 parts), Glove Box Light Bulb (10 parts) and Trunk / Cargo Area Light Bulb (10 parts). The other 5 part types cover the remaining 8 parts.
The 2018 Audi TT was sold with 3 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
9 brands supply electrical bulb & socket parts for the 2018 Audi TT, led by SYLVANIA (12 parts), WAGNER (9 parts) and HELLA (7 parts), plus 6 more brands. Quality grades include Standard Replacement, Extended Life and LED.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2018 Audi TT. 6 parts have it, including SYLVANIA 2825LL (Door Panel Light Bulb) and SYLVANIA 2825LL (Glove Box Light Bulb). Each part number opens a page with every vehicle that part fits.
Door Panel Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 1.8L L4 Turbocharged | 2825LL | 🇲🇽 MX | Long LifeBase Type: W2.1x9.5d | View on Amazon |
| WAGNER Fits: 1.8L L4 Turbocharged | 17177LL | 🇲🇽 MX | Long LifeW2.1x9.5d Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 1.8L L4 Turbocharged | 2825ST | 🇲🇽 MX | BlueSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 1.8L L4 Turbocharged | 2825SL | 🇲🇽 MX | LEDCool White | View on Amazon |
| WAGNER Fits: 1.8L L4 Turbocharged | T10LED | 🇲🇽 MX | Tru View PLUS LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Popular Fits: 1.8L L4 Turbocharged | 17177 | 🇲🇽 MX | W2.1x9.5d Base5.000 Watt | View on Amazon |
| SYLVANIA Fits: 1.8L L4 Turbocharged | 2825 | 🇲🇽 MX | Base Type: W2.1x9.5dWattage: 5.00 W | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.5L L5 Turbocharged | 2825 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: 2.5L L5 Turbocharged | 2825BL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| VEMO Fits: 2.5L L5 Turbocharged | V10840028 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes: Expert Kits + | 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 are listed for the 2018 Audi TT, from SYLVANIA, WAGNER, HELLA and 1 other brand. SYLVANIA 2825LL carries the "Popular" badge.
The Extended Life section lists 2 options from SYLVANIA and WAGNER — grouped under the catalog's "Extended Life" designation — the notes column spells out what sets them apart. SYLVANIA 2825LL 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 2825ST is listed in this group.
In the LED (instant-on, long life, energy-saving) grade, SYLVANIA 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 SYLVANIA 2825SL.
The Standard Replacement section lists 2 options from WAGNER and SYLVANIA — built to original-equipment specification. WAGNER 17177 is listed in this group.
3 ungrouped parts are not assigned to a grade, with the same engine-level match.
Glove Box Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 1.8L L4 Turbocharged | 2825LL | 🇲🇽 MX | Long LifeBase Type: W2.1x9.5d | View on Amazon |
| WAGNER Fits: 1.8L L4 Turbocharged | 17177LL | 🇲🇽 MX | Long LifeW2.1x9.5d Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 1.8L L4 Turbocharged | 2825ST | 🇲🇽 MX | BlueSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 1.8L L4 Turbocharged | 2825SL | 🇲🇽 MX | LEDCool White | View on Amazon |
| WAGNER Fits: 1.8L L4 Turbocharged | T10LED | 🇲🇽 MX | Tru View PLUS LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Popular Fits: 1.8L L4 Turbocharged | 17177 | 🇲🇽 MX | W2.1x9.5d Base5.000 Watt | View on Amazon |
| SYLVANIA Fits: 1.8L L4 Turbocharged | 2825 | 🇲🇽 MX | Base Type: W2.1x9.5dWattage: 5.00 W | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.5L L5 Turbocharged | 2825 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: 2.5L L5 Turbocharged | 2825BL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| PEAK Fits: 2.5L L5 Turbocharged | 2825 | 🇺🇸 US 🇨🇦 CA | Average Rated Life: 750.0 HR | 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 are listed for the 2018 Audi TT, from SYLVANIA, WAGNER, HELLA and 1 other brand. SYLVANIA 2825LL 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): 2 parts, from SYLVANIA and WAGNER. A representative part number is SYLVANIA 2825SL.
The Standard Replacement section: 2 options from WAGNER and SYLVANIA. WAGNER 17177 is listed in this group.
3 ungrouped parts are not assigned to a grade, with the same engine-level match.
Headlamp Bulb
HID (intense white light)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS Fits: 2.5L L5 Turbocharged | D5S | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Xenon (12V - 25W) | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: 2.5L L5 Turbocharged | H8 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | High Beam | 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.
2 Headlamp Bulb parts are listed for the 2018 Audi TT, from ÜRO PARTS and PHILIPS.
The HID (intense white light) section lists 1 option from ÜRO PARTS — grouped under the catalog's "HID (intense white light)" designation — the notes column spells out what sets them apart. ÜRO PARTS D5S is listed in this group.
The Standard Replacement section: 1 option from PHILIPS. PHILIPS H8 is listed in this group.
Listed part numbers: ÜRO PARTS D5S and PHILIPS H8.
Headlamp Socket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 1.8L L4 Turbocharged | PT2298 | 🇺🇸 US 🇨🇦 CA | GoldHeight (In): 1.5 in | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4 Turbocharged | HP3835 | 🇲🇽 MX | HandypackConnector Shape: Oval | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.8L L4 Turbocharged | S553 | 🇲🇽 MX | Connector Shape: OvalContact Terminal Material: Metal | 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 are listed for the 2018 Audi TT, from STANDARD MOTOR PRODUCTS and ACDELCO.
This group includes ACDELCO PT2298, STANDARD MOTOR PRODUCTS HP3835 and STANDARD MOTOR PRODUCTS S553.
Step / Courtesy Light Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK Fits: 2.5L L5 Turbocharged | 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.
This group shows a single part: PEAK 2825.
Tail Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.5L L5 Turbocharged | 2825 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | 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.
One part is listed for the 2018 Audi TT — HELLA 2825.
Trunk / Cargo Area Light Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Popular Fits: 1.8L L4 Turbocharged | 2825LL | 🇲🇽 MX | Long LifeBase Type: W2.1x9.5d | View on Amazon |
| WAGNER Fits: 1.8L L4 Turbocharged | 17177LL | 🇲🇽 MX | Long LifeW2.1x9.5d Base | View on Amazon |
Extra Bright (improved visibility, but shorter life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 1.8L L4 Turbocharged | 2825ST | 🇲🇽 MX | BlueSilver Star | View on Amazon |
LED (instant-on, long life, energy-saving)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA Fits: 1.8L L4 Turbocharged | 2825SL | 🇲🇽 MX | LEDCool White | View on Amazon |
| WAGNER Fits: 1.8L L4 Turbocharged | T10LED | 🇲🇽 MX | Tru View PLUS LED | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAGNER Popular Fits: 1.8L L4 Turbocharged | 17177 | 🇲🇽 MX | W2.1x9.5d Base5.000 Watt | View on Amazon |
| SYLVANIA Fits: 1.8L L4 Turbocharged | 2825 | 🇲🇽 MX | Base Type: W2.1x9.5dWattage: 5.00 W | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Fits: 2.5L L5 Turbocharged | 2825 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| HELLA Fits: 2.5L L5 Turbocharged | 2825BL | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IncandescentSocket Type Bulb: W2.1x9.5d | View on Amazon |
| PEAK Fits: 2.5L L5 Turbocharged | 2825 | 🇺🇸 US 🇨🇦 CA | Average Rated Life: 750.0 HR | 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 are listed for the 2018 Audi TT, from SYLVANIA, WAGNER, HELLA and 1 other brand. SYLVANIA 2825LL 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): 2 parts, from SYLVANIA and WAGNER. A representative part number is SYLVANIA 2825SL.
The Standard Replacement section: 2 options from WAGNER and SYLVANIA. WAGNER 17177 is listed in this group.
3 ungrouped parts are not assigned to a grade, with the same engine-level match.
Turn Signal Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PHILIPS Fits: 2.5L L5 Turbocharged | 12174NA | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Natural Amber | 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.
This group shows a single part: PHILIPS 12174NA.
Buying Electrical Bulb & Socket Parts for a 2018 Audi TT
On this vehicle, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination.
- Match the engine first. Every electrical bulb & socket part here is engine-specific; each row shows which engine(s) it fits.
- 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: Door Panel Light Bulb and Glove Box Light Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2018 Audi TT?
Our catalog currently lists 38 electrical bulb & socket parts for the 2018 Audi TT across 8 subcategories and 9 brands, covering all 3 engine options (1.8L L4 Turbocharged, 2.0L L4 Turbocharged and 2.5L L5 Turbocharged). Each part is matched to the engine(s) it fits.
Do electrical bulb & socket parts differ between 2018 Audi TT engines?
Yes. Every electrical bulb & socket part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical bulb & socket problems on a 2018 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 2018 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 2018 Audi TT?
First match the engine — each row shows which engine(s) the part fits. 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 2018 Audi TT
Electrical Bulb & Socket Parts for Other Audi TT Years
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