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215 Vehicles

921K Bulb Fitment Guide

The 921K bulb is used by 215 vehicles from 6 makes. Commonly found in Reverse Light positions.

Positions

1

Reverse Light

Vehicles

215

Makes

6

Compatible Vehicles

ModelYearsPositionsView
128i20092013Reverse LightDetails
135i20082013Reverse LightDetails
328i20092011Reverse LightDetails
328i xDrive20092011Reverse LightDetails
335d20092010Reverse LightDetails
335i20092011Reverse LightDetails
335i xDrive20092012Reverse LightDetails
335is20122012Reverse LightDetails
525i20072007Reverse LightDetails
525xi20062007Reverse LightDetails
528i20082016Reverse LightDetails
528i xDrive20092016Reverse LightDetails
528xi20082008Reverse LightDetails
530i20062007Reverse LightDetails
535d20142016Reverse LightDetails
535d xDrive20142015Reverse LightDetails
535i20082016Reverse LightDetails
535i GT20112014Reverse LightDetails
535i GT xDrive20122015Reverse LightDetails
535i xDrive20112016Reverse LightDetails
535xi20082010Reverse LightDetails
550i20072010Reverse LightDetails
640i20122017Reverse LightDetails
640i Gran Coupe20132017Reverse LightDetails
640i xDrive20142017Reverse LightDetails
640i xDrive Gran Coupe20142017Reverse LightDetails
650i20082017Reverse LightDetails
650i Gran Coupe20132017Reverse LightDetails
650i xDrive20122016Reverse LightDetails
650i xDrive Gran Coupe20132017Reverse LightDetails
750i20072015Reverse LightDetails
750i xDrive20092015Reverse LightDetails
750Li20062014Reverse LightDetails
750Li xDrive20092015Reverse LightDetails
760i20062006Reverse LightDetails
760Li20062010Reverse LightDetails
M320082012Reverse LightDetails
M520082014Reverse LightDetails
M620142017Reverse LightDetails
M6 Gran Coupe20142019Reverse LightDetails
X320072017Reverse LightDetails
X520082011Reverse LightDetails
Z420072016Reverse LightDetails

ModelYearsPositionsView
Enclave20082017Reverse LightDetails
LaCrosse20142016Reverse LightDetails

ModelYearsPositionsView
ELR20142016Reverse LightDetails

ModelYearsPositionsView
Camaro20152015Reverse LightDetails
Cruze20112018Reverse LightDetails
Malibu20132015Reverse LightDetails

ModelYearsPositionsView
Terrain20162017Reverse LightDetails

ModelYearsPositionsView
Ion20032007Reverse LightDetails

Frequently Asked Questions

The 921K bulb is used by 215 vehicles from 6 makes including BMW, Buick, Cadillac, Chevrolet, GMC. Browse the full compatibility list below.

Yes, LED replacements are available for the 921K bulb size. LED 921K bulbs offer brighter output, longer lifespan, and lower power consumption compared to halogen.

The 921K bulb is commonly used in these positions: Reverse Light. The exact position depends on your vehicle's make and model.

Standard halogen 921K bulbs typically cost $10–$30 for a pair. LED 921K conversion kits range from $25–$60. Premium brands may cost more but often offer better performance and warranty.

All 921K bulbs share the same base and fitment, but they vary in technology (halogen, LED, HID), brightness, color temperature, and brand quality. We recommend LED for the best balance of brightness and lifespan.