What is the low beam headlight bulb size for a 1991 Alfa Romeo Spider?

The 1991 Alfa Romeo Spider uses a 9004 LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 1991 Alfa Romeo Spider?

The high beam bulb size for the 1991 Alfa Romeo Spider is 9004 LED.

Why are my 1991 Alfa Romeo Spider headlights dim?

Dim headlights on a 1991 Alfa Romeo Spider can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 9004 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1991 Alfa Romeo Spider fog light?

The 1991 Alfa Romeo Spider uses a H2 LED bulb for the fog light position.

Is the 1991 Alfa Romeo Spider single or dual beam?

The 1991 Alfa Romeo Spider uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

Can I install LED bulbs on my 1991 Alfa Romeo Spider?

Yes, the 1991 Alfa Romeo Spider comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 9004 LED LED conversion kit for the low beams.

Does the 1991 Alfa Romeo Spider have fog lights?

Yes, the 1991 Alfa Romeo Spider takes a H2 LED bulb for the fog light position.

Did the 1991 Alfa Romeo Spider change headlight bulb sizes from the previous year?

No — the 1991 Alfa Romeo Spider uses the same bulb sizes as the 1990 model. This configuration has been consistent across the 1989–1994 generation.

How do I change the headlight on a 1991 Alfa Romeo Spider?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old 9004 LED bulb counter-clockwise to remove it, then insert the new bulb and reassemble. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 1991 Alfa Romeo Spider?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved 9004 LED LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 1991 Alfa Romeo Spider headlights?

A pair of halogen 9004 LED bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 1991 Alfa Romeo Spider?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the 9004 LED position are available as direct plug-and-play replacements.

The 1991 Alfa-Romeo Spider shares its bulb sizes with the 1989–1994 generation.

Fitment Guaranteed for 1991 Alfa-Romeo Spider

What Size Bulbs Does a 1991 Alfa-Romeo Spider Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Easy (Plug and Play)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

What Lighting System Does the 1991 Alfa-Romeo Spider Have?

Lighting on the 1991 Alfa-Romeo Spider is managed by a total of 14 bulbs, covering everything from primary headlights to signal indicators. It features an extensive lighting system powered by a halogen-based setup where a single 9004 LED dual-filament bulb handles both low and high beam duties within the same reflector.

Can You Put LED Bulbs in a 1991 Alfa-Romeo Spider?

Upgrading to LED is one of the most effective ways to modernize your Alfa-Romeo's appearance and safety profile. Since your Spider uses a single 9004 LED bulb for both high and low beams, ensure your chosen LED kit is "dual-beam" compatible. This allows the LED circuitry to mimic the two-filament design of the original halogen bulb. Don't forget the H2 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

1991 Alfa-Romeo Spider Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	9004 LED	Buy 9004 LED →
High Beam	9004 LED	Buy 9004 LED →
Fog Light	H2 LED	Buy H2 LED →
Brake Light	1156	Buy 1156 →
Dome Light	DE3423	Buy DE3423 →
Side Marker	168	Buy 168 →
Turn Signal Front	1156	Buy 1156 →
License Plate	67	Buy 67 →
Map Light	DE3175	Buy DE3175 →
Parking Light	1895 or 168 or 67	Buy 1895 or 168 or 67 →
Turn Signal Rear	1156	Buy 1156 →
Reverse Light	1156	Buy 1156 →
Trunk Light	DE3423	Buy DE3423 →
Tail Light	168	Buy 168 →

How do the 1991 Alfa-Romeo Spider's bulbs compare to other years?

The 1991 Alfa-Romeo Spider uses the same bulbs as the 1990 model.

The 1992 model continues with the same bulb sizes.

This bulb configuration covers the 1989–1994 model years. ← 1990 1992 →

Finding the best installation guide...

Other Spider Years

1994 1993 1992 1990 1989 1988

More from Alfa-Romeo

164 4C Giulia Milano Spider Graduate Spider Quadrifoglio Spider Veloce Stelvio

Other Vehicles That Use 9004 LED Bulbs

2005 Chevrolet Venture 2003 Isuzu Rodeo Sport 2002 Dodge Ram 2500 2002 Dodge Ram 3500 2002 Isuzu Trooper 2001 Nissan Xterra