The 2018 BMW 520I has 9 electrical bulb & socket parts with verified fitment on this page — 3 part types and 4 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2018 BMW 520I, the bulb and socket system covers every bulb and socket on the vehicle, from headlamps to instrument-cluster illumination. All 9 listed parts are Turn Signal Lamp Bulb (5 parts), Back Up / Reverse Lamp Bulb (3 parts) and Headlamp Bulb (1 part).
Every part on this page is matched to the 2.0L L4 Turbocharged — the only engine offered in the 2018 BMW 520I.
The most listed brands for 2018 BMW 520I electrical bulb & socket parts are HELLA (4 parts), SYLVANIA (2 parts) and WAGNER (2 parts), plus 1 more brand. Quality grades include Standard Replacement and Extended Life.
1 part on this 2018 BMW 520I page carries a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — HELLA 7507 (Turn Signal Lamp Bulb). Click any part number to see every vehicle that part fits.
Back Up / Reverse Lamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 7507 | 🇲🇽 MX | IncandescentSocket Type Bulb: S8.5d or Socket Type Bulb: BAU15S | View on Amazon |
| HELLA | H21W | 🇲🇽 MX | HalogenSocket Type Bulb: BAY9S | View on Amazon |
| PHILIPS | H21W | 🇲🇽 MX | 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.
3 Back Up / Reverse Lamp Bulb parts are listed for the 2018 BMW 520I, from HELLA and PHILIPS.
Listed part numbers: HELLA 7507 and HELLA H21W, plus the other parts above.
Headlamp Bulb
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | H7 | 🇲🇽 MX | HalogenSocket Type Bulb: PX26D | 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.
This group shows a single part: HELLA H7.
Turn Signal Lamp Bulb
Extended Life
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SYLVANIA | 7507LL | 🇲🇽 MX | AmberLong Life | View on Amazon |
| WAGNER | 17638NALL | 🇲🇽 MX | Long LifeNatural Amber | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA Popular | 7507 | 🇲🇽 MX | IncandescentSocket Type Bulb: S8.5d or Socket Type Bulb: BAU15S | View on Amazon |
| SYLVANIA | 7507 | 🇲🇽 MX | Frontwithout adaptive lighting | View on Amazon |
| WAGNER | 17638NA | 🇲🇽 MX | 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.
5 Turn Signal Lamp Bulb parts are listed for the 2018 BMW 520I, from SYLVANIA, WAGNER and HELLA. HELLA 7507 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 7507LL is listed in this group.
The Standard Replacement section lists 3 options from HELLA, SYLVANIA and WAGNER — built to original-equipment specification. HELLA 7507 is listed in this group.
This group includes HELLA 7507, SYLVANIA 7507LL and WAGNER 17638NALL and the remaining parts above.
Buying Electrical Bulb & Socket Parts for a 2018 BMW 520I
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: Turn Signal Lamp Bulb and Back Up / Reverse Lamp Bulb .
Frequently Asked Questions
How many electrical bulb & socket parts fit the 2018 BMW 520I?
Our catalog currently lists 9 electrical bulb & socket parts for the 2018 BMW 520I across 3 subcategories and 4 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 2018 BMW 520I?
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 BMW 520I 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 BMW 520I?
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 2018 BMW 520I
Electrical Bulb & Socket Parts for Other BMW 520I 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.