Bulb size & fitment reference

Oldsmobile Alero
Bulb Size Guide

Get the bulb-size answer first, then check factory-system differences and position-specific notes before buying.

Select Your Vehicle

Quick Answer for 2004 Oldsmobile Alero

Start with the positions you’re most likely to replace. Full fitment details are below.

Headlight High Beam

Headlight Low Beam

Reverse Light

912 / 921 / T15

Shop this position →

Brake Light

Full Bulb Fitment by Lighting Position

Find the bulb size for each lighting position and check any fitment notes before ordering.

Oldsmobile Alero (1999–2004) Bulb Size Chart

Lighting PositionBulb SizeNoteNext Step
Headlight High Beam9005 / HB3Shop position →
Headlight Low Beam9006 / HB4Shop position →
Fog Light881Shop position →
Front Turn Signal3157 / 3156Shop position →
Parking Light3157 / 3156Shop position →
Rear Turn Signal3157 / 3156Shop position →
Brake Light3157 / 3156Shop position →
Center High Mount Stop Light912 / 921 / T15Shop position →
Tail Light3157 / 3156Shop position →
Outer Tail Light3157 / 3156Shop position →
Inner Tail Light3157 / 3156Shop position →
Reverse Light912 / 921 / T15Shop position →
License Plate LightT10 / 194 / 168Shop position →
Front Side Marker LightT10 / 194 / 168Shop position →
Rear Side Marker LightT10 / 194 / 168Shop position →
Dome Light211-2 / 578 / 41MMShop position →
Map Light211-2 / 578 / 41MMShop position →
Courtesy LightT10 / 194 / 168Shop position →
Glove Box LightT10 / 194 / 168Shop position →
Trunk Light211-2 / 578 / 41MMShop position →
View Fitment Options →
Fitment Reminder
Bulb size can vary by factory setup. If you're unsure which option applies to your vehicle, confirm your current bulb or select your configuration on the product page.