229 Vehicles
921K Bulb Fitment Guide
The 921K bulb family is used by 229 vehicles from 8 makes. Commonly found in Reverse Light, Brake Light positions.
Positions
2
Reverse Light, Brake LightVehicles
229
Makes
8
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Top Compatible Vehicles
Showing 23 high-volume model groups across 8 makes. This bulb appears in 54 model groups overall.
| Model | Years | Positions | View |
|---|---|---|---|
| 650i | 2008–2017 | Reverse Light | Details |
| 535i | 2008–2016 | Reverse Light | Details |
| X3 | 2007–2017 | Reverse Light | Details |
| Z4 | 2007–2016 | Reverse Light | Details |
| 528i | 2008–2016 | Reverse Light | Details |
| 528i xDrive | 2009–2016 | Reverse Light | Details |
| 750i | 2007–2015 | Reverse Light | Details |
| 750Li | 2006–2014 | Reverse Light | Details |
| M5 | 2008–2014 | Reverse Light | Details |
| M6 Gran Coupe | 2014–2019 | Reverse Light | Details |
| 135i | 2008–2013 | Reverse Light | Details |
| 535i xDrive | 2011–2016 | Reverse Light | Details |
Showing 12 of 43 BMW model groups that use 921K.
| Model | Years | Positions | View |
|---|---|---|---|
| Ion | 2003–2007 | Reverse Light | Details |
| Model | Years | Positions | View |
|---|---|---|---|
| ELR | 2014–2016 | Reverse Light | Details |
| Model | Years | Positions | View |
|---|---|---|---|
| Town & Country | 2005–2007 | Brake Light | Details |
| Model | Years | Positions | View |
|---|---|---|---|
| Terrain | 2016–2017 | Reverse Light | Details |
For exact fitment, search your year, make, and model or choose a specific vehicle page. Full compatibility is still represented in the page totals above.
Frequently Asked Questions
The 921K bulb family is listed for 229 vehicles from 8 makes including BMW, Buick, Cadillac, Chevrolet, Chrysler. Browse the compatibility list below and verify your exact vehicle before buying.
LED replacements are available for many 921K applications, but beam pattern, physical clearance, electronics, and legal use can vary by housing. Check seller fitment notes and verify the existing bulb first.
The 921K bulb family appears in these positions in our database: Reverse Light, Brake Light. The exact position depends on year, make, model, and lighting package.
Cost depends on brand, technology, and whether you are buying a halogen replacement or LED conversion. Compare products that list the exact 921K bulb family and your vehicle fitment.
921K products share the same bulb family designation, but output, technology, heat behavior, and beam pattern vary. Choose a product that matches your housing and intended use.
Related Bulb Types
These bulb families are linked because they share aliases, common lighting positions, or similar vehicle coverage in the database.