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1981 BMW 633CSi 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.

1981 BMW 633CSi Bulb Size Chart

PositionBulb CodeAliasesTrim / PackageFactory TypeConfidenceReviewNotesShop
Turn Signal Front7528—Standard listingHalogenHigh
Pending

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

Amazon
High BeamH5001—Standard listingHalogenHigh
Pending

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

Amazon
Low BeamH5006—Standard listingHalogenHigh
Pending

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

Amazon
Parking Light7528—Standard listingHalogenMedium
Pending

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

Amazon

1981 BMW 633CSi Fitment Notes

Our database shows the same listed bulb sizes for the BMW 633CSi across the 1978 to 1983 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 1981 BMW 633CSi's bulbs compare to other years?

The 1981 BMW 633CSi changed bulb sizes from 1979. The previous model year used a different configuration.

The 1982 model continues with the same bulb sizes.

This bulb configuration covers the 1981–1982 model years. ← 1979 1982 →

Finding the best installation guide...

Other 633CSi Years

1983198219791978

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Other Vehicles That Use H5006 Bulbs

1991 Isuzu Impulse1989 Jaguar Vanden Plas1989 Jaguar XJ121989 Jaguar XJ61989 Jaguar XJS1988 Ferrari Testarossa

Frequently Asked Questions

Our database lists H5006 for the 1981 BMW 633CSi low beam headlights. Verify the bulb number on your existing bulb and confirm your trim or factory lighting package before buying.

Our database lists H5001 for the 1981 BMW 633CSi high beam position. Some vehicles vary by trim, lighting package, or previous housing changes.

Dim headlights on a 1981 BMW 633CSi can come from aging halogen bulbs, cloudy lenses, weak electrical connections, or an incorrect bulb. Confirm the listed H5006 size against the bulb in the housing before choosing a replacement or upgrade.

The 1981 BMW 633CSi 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 1981 BMW 633CSi uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

LED upgrades are available for many H5006 applications, but fitment, beam pattern, dashboard warnings, and road-use legality can vary. Use products that list your exact bulb family, such as H5006, and verify the factory housing before buying.

Yes — the 1981 BMW 633CSi uses different bulb sizes than the 1979 model. The 1981–1982 generation introduced this bulb configuration.

The 1981 BMW 633CSi is the first year in the 1981–1982 generation to use the H5006 bulb for the low beam headlight.

Access varies by engine bay layout and headlight housing. Before disassembly, confirm the listed H5006 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 H5006 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 1981 BMW 633CSi.