What is the low beam headlight bulb size for a 1966 Chevrolet Impala?

The 1966 Chevrolet Impala 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 1966 Chevrolet Impala?

The high beam bulb size for the 1966 Chevrolet Impala is 5001 LED.

Why are my 1966 Chevrolet Impala headlights dim?

Dim headlights on a 1966 Chevrolet Impala 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 1966 Chevrolet Impala fog light?

The 1966 Chevrolet Impala uses a LED Fog Light bulb for the fog light position.

Is the 1966 Chevrolet Impala single or dual beam?

The 1966 Chevrolet Impala uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 1966 Chevrolet Impala?

Yes, the 1966 Chevrolet Impala 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 1966 Chevrolet Impala have fog lights?

Yes, the 1966 Chevrolet Impala takes a LED Fog Light bulb for the fog light position.

Did the 1966 Chevrolet Impala change headlight bulb sizes from the previous year?

Yes — the 1966 Chevrolet Impala uses different bulb sizes than the 1965 model. The 1966 generation introduced this bulb configuration.

Is the 1966 Chevrolet Impala the first or last year to use 4000 LED bulbs?

The 1966 Chevrolet Impala is the only year in the 1966 generation to use the 4000 LED bulb for the low beam headlight.

How do I change the headlight on a 1966 Chevrolet Impala?

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 1966 Chevrolet Impala?

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 1966 Chevrolet Impala 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 1966 Chevrolet Impala?

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.

The 1966 Chevrolet Impala has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 1966 Chevrolet Impala

What Size Bulbs Does a 1966 Chevrolet Impala 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 1966 Chevrolet Impala Have?

The 1966 Chevrolet Impala utilizes a refined lighting configuration featuring 13 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 Impala's 1958-2020 production span.

Can You Put LED Bulbs in a 1966 Chevrolet Impala?

For a Chevrolet built for the road and trail, LED upgrades provide the high-contrast lighting needed for better obstacle detection. 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.

1966 Chevrolet Impala 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	257	Buy 257 →
Turn Signal Front	1157 LED	Buy 1157 LED →
Turn Signal Rear	1157 LED	Buy 1157 LED →
Reverse Light	1156	Buy 1156 →
Dome Light	211-2	Buy 211-2 →
License Plate	1155	Buy 1155 →
Map Light	562	Buy 562 →
Parking Light	1157	Buy 1157 →
Trunk Light	1003	Buy 1003 →
Tail Light	1157	Buy 1157 →

How do the 1966 Chevrolet Impala's bulbs compare to other years?

The 1966 Chevrolet Impala changed bulb sizes from 1965. The previous model year used a different configuration.

The 1967 model switched to a different bulb configuration.

This bulb configuration covers the 1966 model years. ← 1965 1967 →

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Other Impala Years

2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1996 1995 1994 1985 1984 1983 1982 1981 1980 1979 1978 1975 1974 1973 1971 1970 1969 1968 1967 1965 1964 1963 1962 1961 1960 1959 1958

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