921 Bulb Replacement Guide

What cars use 921 bulbs?

Use the form below to see whether this bulb appears in fitment data for a specific vehicle.

Replacement options

Philips 12789LPB2 Bright White Vision
Halogen

Philips 12789LPB2 Bright White Vision

$22.95
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JDM ASTAR Extremely Bright 2000 Lumens
LED

JDM ASTAR Extremely Bright 2000 Lumens

$14.99
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LASFIT 921 912 LED Bulb
LED

LASFIT 921 912 LED Bulb

$14.99
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AUXITO LED High Power 2835 15-SMD Chipsets
LED

AUXITO LED High Power 2835 15-SMD Chipsets

$11.99
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Philips Automotive Lighting 921WLED Ultinon LED (White)
LED

Philips Automotive Lighting 921WLED Ultinon LED (White)

$22.28
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SYLVANIA - 921 SilverStar Mini Bulb - Brighter and Whiter Light, Ideal for Center High Mount Stop Light (CHMSL) and More (Contains 2 Bulbs)
Halogen

SYLVANIA - 921 SilverStar Mini Bulb - Brighter and Whiter...

$11.75
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QYKAVM 921 Bulb 12Pcs,912 RV Light Bulbs 12V W16W for Reverse Brake Tail
Halogen

QYKAVM 921 Bulb 12Pcs,912 RV Light Bulbs 12V W16W for Rev...

$8.99
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Sylvania - 921 Long Life - High Performance Incandescent Bulb, 35965 (10 Pack)
Halogen

Sylvania - 921 Long Life - High Performance Incandescent ...

$14.49
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Kadiby 12 Bulk Pack 921 Bulb.921ll 912 W16W T15 Light Bulbs.
Halogen

Kadiby 12 Bulk Pack 921 Bulb.921ll 912 W16W T15 Light Bulbs.

$9.99
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Kadiby 20 pack 921 Bulb Back Up/Trunk Cargo/Turn Signal Bulbs.
Halogen

Kadiby 20 pack 921 Bulb Back Up/Trunk Cargo/Turn Signal B...

$12.95
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SYLVANIA 921 Basic Miniature Bulb, (Contains 2 Bulbs) (921.BP2)
Halogen

SYLVANIA 921 Basic Miniature Bulb, (Contains 2 Bulbs) (92...

$8.99
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GIVEDOUA 921 T15 Bulbs, 912 906 916 W16W Automotive Backup/High Mount Brake/Trunk Cargo/Interior Dome/Turn Signal Replacement Bulbs, Fit for Most Sedans, SUVs, Pickup Trucks, RVs and Campers(10 Pack)
Halogen

GIVEDOUA 921 T15 Bulbs, 912 906 916 W16W Automotive Backu...

$6.99
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Lanuovx 921 Bulbs 40 Pack,12V 16W T5 W16W Incandescent Light Bulbs Brake Light Bulb,921 Bulb For License Plate Light Side Marker White Halogen Incandescent Replacement
Halogen

Lanuovx 921 Bulbs 40 Pack,12V 16W T5 W16W Incandescent Li...

$16.99
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AOICANKI 20pcs Super Bright RV Trailer T10 921 194 42-SMD 12V Car Backup Reverse LED Lights Bulbs Light Width Lamp Xenon White
LED

AOICANKI 20pcs Super Bright RV Trailer T10 921 194 42-SMD...

$9.99
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Specifications

Useful info about 921

921 bulb guide

921 is one of the most popular small automotive bulbs. You’ll often see it used for reverse/backup lights, trunk/cargo lights, and other utility positions. Because it’s used in multiple places across different vehicles, always confirm the exact position you’re replacing.

Why people upgrade 921 to LED

  • Backup lights: a quality LED can improve rear visibility and camera clarity.
  • Cargo/trunk: brighter, cleaner light makes the space easier to use.
  • Lower power draw: helpful for interior lights that stay on for longer periods.

What to watch for

  • Polarity: some LED versions only work one way. Flip it if it doesn’t light.
  • Heat: high-output LEDs still need decent cooling.
  • Color: neutral white often gives better contrast than very blue “cool white,” especially in rain or fog.

If you have recurring failures, inspect the socket for corrosion and check that the housing seal isn’t letting water in.

Cross Reference

921 is the same as: 158, 161, 168, 168NA, 175, 192, 193, 194, 194LL, 194NA, 194R, 2821, 2825, 2827, 558, 658, 904, 906, 906NA, 912, 916, 917, 921LL, 922, T12, t15, T8.