Skip to main content
Fitment Guaranteed for 1985 BMW 535i

What Size Bulbs Does a 1985 BMW 535i Use?

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

Installation Difficulty

Hard (Tight clearances)

Est. Replacement Cost

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

What Lighting System Does the 1985 BMW 535i Have?

The 1985 BMW 535i features an extensive lighting system with 11 bulb positions. It uses halogen technology with 4000 LED low beams and H5001 LED high beams in a dual-bulb configuration. The 535i has been available from 1985 to 2016, and the 1985 model falls in the early-generation years. As a BMW vehicle, it uses a CANbus electrical system that monitors bulb status.

Can You Put LED Bulbs in a 1985 BMW 535i?

To upgrade the 1985 BMW 535i headlights to LED, you will need a 4000 LED LED kit for the low beams and a H5001 LED LED kit for the high beams. Start with the low beams since they are used most often and have the biggest impact on nighttime visibility. Important: BMW vehicles use a CANbus system that detects bulb wattage. Standard LED bulbs may trigger dashboard warnings or flicker. Choose LED kits labeled "CANbus-compatible" or add inline decoder resistors to prevent these issues. For the fog lights, a LED Fog Light LED bulb provides a clean white output that pairs well with LED headlights.

How to Replace Bulbs on a 1985 BMW 535i

To remove the headlight bulb, disconnect the wiring harness, then twist the bulb counter-clockwise and pull it straight out of the housing. BMW vehicles are known for tight engine bay clearances around the headlight assembly. You may need to remove the air intake duct, battery cover, or wheel well liner to access the bulbs. Budget 30 to 45 minutes per side for your first replacement. When installing the new bulb, avoid touching the glass with bare fingers. Skin oils create hot spots that shorten bulb life. Wear clean gloves or handle the bulb by its plastic base only. The fog lights are accessed from underneath the front bumper. You may need to remove a few plastic clips or screws from the fender liner to reach the LED Fog Light fog light socket.

Full Upgrade Bundle

Upgrade All 11 Positions at Once

Low Beam: 4000 LEDHigh Beam: H5001 LEDFog Light: LED Fog LightBrake Light: Brake Light AssemblyTurn Signal Front: 7528 LEDTurn Signal Rear: 7506 LEDDome Light: 6411License Plate: 6418Parking Light: 7528Reverse Light: 7506Trunk Light: LED Light
Shop Complete LED Kit

1985 BMW 535i Complete Bulb Size Chart

PositionBulb SizeShop
Low Beam
4000 LEDBuy 4000 LED
High Beam
H5001 LEDBuy H5001 LED
Fog Light
LED Fog LightBuy LED Fog Light
Brake Light
Brake Light AssemblyBuy Brake Light Assembly
Turn Signal Front
7528 LEDBuy 7528 LED
Turn Signal Rear
7506 LEDBuy 7506 LED
Dome Light
6411Buy 6411
License Plate
6418Buy 6418
Parking Light
7528Buy 7528
Reverse Light
7506Buy 7506
Trunk Light
LED LightBuy LED Light

Want to upgrade everything at once?

Shop Complete LED Kit for 1985 BMW 535i
Installation Guide
Open in YouTube →
Video suggestion: Installation GuideBy YouTube

How Long Do 1985 BMW 535i Headlight Bulbs Last?

Standard halogen headlights on the 1985 BMW 535i have an expected lifespan of 500 to 1,000 hours, which works out to roughly 2 to 3 years of normal use. Signs of a failing halogen bulb include noticeably dimmer output, a yellowish tint compared to the other headlight, or intermittent flickering. At 41 years old, the original bulbs on your 535i are likely overdue for replacement. Even if they still illuminate, reduced brightness significantly impacts nighttime safety. When one headlight burns out, replace both sides at the same time. Bulbs from the same batch age at similar rates, and mismatched brightness is distracting to oncoming drivers.

What Bulbs Are Compatible with the 1985 BMW 535i?

The 4000 low beam bulb on the 1985 BMW 535i is a specific fitment. There are no widely recognized cross-compatible alternatives, so make sure to purchase the exact 4000 size. Using the wrong bulb size can cause improper beam patterns that reduce your visibility and blind other drivers. It can also cause overheating inside the headlight housing, potentially warping the plastic lens or reflector. Always verify the bulb number before purchasing.

1985 BMW 535i Headlight FAQ

The 1985 BMW 535i uses a 4000 LED bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

The high beam bulb size for the 1985 BMW 535i is H5001 LED.

The 1985 BMW 535i uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Yes, the 1985 BMW 535i 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.

Yes, the 1985 BMW 535i takes a LED Fog Light bulb for the fog light position.

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. Note: BMW vehicles use a CANbus system, so LED replacements may need an anti-flicker decoder. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

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.

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.

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. Since the BMW uses CANbus monitoring, choose a CANbus-compatible LED kit to avoid dashboard errors.

Did BMW 535i Bulb Sizes Change Over the Years?

Over its production run from 1985 to 2016, the BMW 535i has seen bulb size changes in the Low Beam, High Beam and Fog Light positions. The 1985 model uses the earlier bulb specification that was in place before the change around 2013. Always verify the exact bulb size for your specific 1985 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.

Other 535i Years

20162015201420132012201020092008199319921991199019871986
128i135i228i228i xDrive230i230i xDrive318i318is

Other Vehicles That Use 4000 LED Bulbs

These vehicles from other makes also use a 4000 LED low beam bulb:

1996 Chevrolet W3500 Tiltmaster1996 Chevrolet W4500 Tiltmaster1996 Chevrolet W5500 Tiltmaster1983 Peugeot 5051981 Honda Accord1981 Volkswagen Dasher