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1989 Pontiac Optima Bulb Size Chart

Bulb sizes may vary by trim, factory lighting package, region, production date, and previous modifications. Verify the bulb number on your existing bulb before buying.

Last database update: May 2026. Manual review status: Not yet manually reviewed.

Verify before buying: check the bulb number printed on your existing bulb, confirm your trim and factory lighting package, and review the seller's fitment notes.
Disclosure: We may earn a commission from links marked Affiliate. Unmarked retailer links may be plain search links. Always verify bulb fitment before purchasing.

1989 Pontiac Optima Bulb Size Chart

PositionBulb CodeAliasesTrim / PackageFactory TypeConfidenceReviewNotesShop
Low Beam9004HB1Standard listingHalogenHigh
Pending

Dual-beam bulb; verify factory housing and lighting package.

Amazon
Reverse Light889—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
Brake Light1156—Standard listingHalogenHigh
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
License Plate194—Standard listingHalogenMedium
Pending

Verify trim, factory lighting package, and the bulb number on the existing bulb.

Amazon
High Beam9004HB1Standard listingHalogenHigh
Pending

Dual-beam bulb; verify factory housing and lighting package.

Amazon

1989 Pontiac Optima Fitment Notes

Our database shows the same listed bulb sizes for the Pontiac Optima across the 1988 to 1991 range. Still verify your trim, lighting package, and the bulb number in the housing before buying.

Known fitment limitations

  • factory HID or LED packages may use different parts
  • fog lights may depend on equipment package
  • aftermarket headlight assemblies may use different bulbs
  • regional models and production-date splits may differ

See an incorrect bulb size? Submit a correction.

How do the 1989 Pontiac Optima's bulbs compare to other years?

The 1989 Pontiac Optima changed bulb sizes from 1988. The previous model year used a different configuration.

The 1990 model switched to a different bulb configuration.

This bulb configuration covers the 1989 model years. ← 1988 1990 →

Finding the best installation guide...

Other Optima Years

199119901988

More from Pontiac

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Other Vehicles That Use 9004 / HB1 Bulbs

2005 Chevrolet Venture2004 Oldsmobile Silhouette2003 Dodge Ram Van2003 Dodge Wagon2003 Isuzu Rodeo Sport2002 Dodge Ram 2500

Frequently Asked Questions

Our database lists 9004 for the 1989 Pontiac Optima low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists 9004 for the 1989 Pontiac Optima high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 1989 Pontiac Optima can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed 9004 size against the bulb in the housing before choosing a replacement or upgrade.

The 1989 Pontiac Optima does not have a fog light bulb listed in our current database. If your vehicle has fog lights, verify the bulb in the housing or owner's manual before buying.

The 1989 Pontiac Optima uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

LED upgrades are available for many 9004 applications, but fitment, beam pattern, dashboard warnings, and road-use legality can vary. Use products that list your exact bulb family, such as 9004 / HB1, and verify the factory housing before buying.

Yes — the 1989 Pontiac Optima uses different bulb sizes than the 1988 model. The 1989 generation introduced this bulb configuration.

The 1989 Pontiac Optima is the only year in the 1989 generation to use the 9004 bulb for the low beam headlight.

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed 9004 low beam size on the existing bulb or owner's manual, then follow the service procedure for your exact trim.

Rules for LED headlight retrofits vary by location and by housing type. Avoid products that create glare or lack road-use compliance claims, and check local requirements before using an LED conversion on public roads.

Replacement cost depends on bulb technology, brand, and labor access. Common halogen 9004 replacements are usually cheaper than LED conversion kits. Check seller fitment notes before comparing prices.

Halogen bulbs and LED replacements differ in output, heat behavior, beam pattern, and electronics. A correct bulb code does not guarantee a correct LED beam pattern, so verify physical fit and seller compatibility notes for the 1989 Pontiac Optima.