What is the low beam headlight bulb size for a 1978 Peugeot 604?

The 1978 Peugeot 604 uses a 4000 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 1978 Peugeot 604?

The high beam bulb size for the 1978 Peugeot 604 is 5001 LED.

Why are my 1978 Peugeot 604 headlights dim?

Dim headlights on a 1978 Peugeot 604 can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a 4000 LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 1978 Peugeot 604 fog light?

The 1978 Peugeot 604 uses a LED Fog Light bulb for the fog light position.

Is the 1978 Peugeot 604 single or dual beam?

The 1978 Peugeot 604 uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1978 Peugeot 604?

Yes, the 1978 Peugeot 604 comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a 4000 LED LED conversion kit for the low beams.

Does the 1978 Peugeot 604 have fog lights?

Yes, the 1978 Peugeot 604 takes a LED Fog Light bulb for the fog light position.

How do I change the headlight on a 1978 Peugeot 604?

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 4000 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 1978 Peugeot 604?

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 4000 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 1978 Peugeot 604 headlights?

A pair of halogen 4000 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 1978 Peugeot 604?

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 4000 LED position are available as direct plug-and-play replacements.

Fitment Guaranteed for 1978 Peugeot 604

What Size Bulbs Does a 1978 Peugeot 604 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 1978 Peugeot 604 Have?

The 1978 Peugeot 604 utilizes a refined lighting configuration featuring 11 distinct bulb positions. It features an extensive lighting system powered by a dual-bulb halogen configuration using separate 4000 LED low beam and 5001 LED high beam bulbs for precise light distribution. This model belongs to the early years of the 604's 1978-1984 production span.

Can You Put LED Bulbs in a 1978 Peugeot 604?

Upgrading to LED is one of the most effective ways to modernize your Peugeot's appearance and safety profile. We recommend starting your upgrade with the 4000 LED low beams, as they see the most use. Adding a matching 5001 LED LED kit later will complete the look and ensure consistent lighting performance. Don't forget the LED Fog Light fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

1978 Peugeot 604 Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	4000 LED	Buy 4000 LED →
High Beam	5001 LED	Buy 5001 LED →
Fog Light	LED Fog Light	Buy LED Fog Light →
Brake Light	Brake Light Assembly	Buy Brake Light Assembly →
Side Marker	5007 LED	Buy 5007 LED →
Turn Signal Front	7506 LED	Buy 7506 LED →
Turn Signal Rear	7506 LED	Buy 7506 LED →
Reverse Light	7506	Buy 7506 →
License Plate	5007	Buy 5007 →
Parking Light	5007	Buy 5007 →
Trunk Light	LED Light	Buy LED Light →

Installation Guide

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Other 604 Years

1984 1982 1980 1979

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