What steps should be taken if one headlight only works on high or low beam on BMW Z3?

If a car has an operational only high beam or low beam headlight, there will be battery voltage at the headlight electrical connector; change the headlight assembly or bulb where there is available. If voltage is not present the problem must be worked out according to the headlight wiring diagram. If the headlight does not work both high or low beam then apply voltage and ground at the headlight electrical connector. If voltage is present, check also the headlight connector ground terminal for a good connection to ground. If battery voltage and ground are present the repairer should replace either the headlight assembly or bulb if can be done separately. If headlight voltage failed or if head light ground failed then check the wiring diagram of headlight. Also, check and test the headlight switch and replace it if it has a bad or malfunctions in its performance. When lights are very poor or non existent, test for battery voltage and ground at the headlight electrical terminal. In case there is voltage present, check the ground circuit for the headlamp electrical connector and clean and repair as the case may be. If the voltage at this point if lower than that of the battery attach a multimeter between the headlight electrical connector and the headlight wiring diagram to determine the position where the voltage dropped.

Genuine BMW Z3 Headlight

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6 Headlights found

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BMW Z3 Right Headlight
Part Number: 63128386048
$1242.79 MSRP: $1626.09
You Save: $383.30 (24%)
ADD TO CART
Product Specifications
- Other Name: Right Headlight, White Turn Indicator; Composite Assembly
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1996-2002 BMW Z3 | 1.9L Engine(E36), 2.8L Engine(E36), Coupe(E36), Roadster 1.9L(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36), Roadster(E36)
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BMW Z3 Right Headlight
Part Number: 63128381092
$1242.79 MSRP: $1626.09
You Save: $383.30 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Headlight Right; Composite Assembly, Headlamp Assembly
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1996-2002 BMW Z3 | 1.9L Engine(E36), 2.8L Engine(E36), Coupe(E36), Roadster 1.9L(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36), Roadster(E36)
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BMW Z3 Front Left Headlight
Part Number: 63128381091
$1242.79 MSRP: $1626.09
You Save: $383.30 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Headlight Left; Composite Assembly, Headlamp Assembly
- Position: Driver Side
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1996-2002 BMW Z3 | 1.9L Engine(E36), 2.8L Engine(E36), Coupe(E36), Roadster 1.9L(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36), Roadster(E36)
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BMW Z3 Headlight Front Right
Part Number: 63128389518
$1242.79 MSRP: $1626.09
You Save: $383.30 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Headlight Right; Composite Assembly, Headlamp Assembly
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1996-2002 BMW Z3 | 1.9L Engine(E36), 2.8L Engine(E36), Coupe(E36), Roadster 1.9L(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36), Roadster(E36)
View related parts
BMW Z3 Headlight Front Left
Part Number: 63128389517
$1242.79 MSRP: $1626.09
You Save: $383.30 (24%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Headlight Left; Composite Assembly, Headlamp Assembly
- Position: Driver Side
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1996-2002 BMW Z3 | 1.9L Engine(E36), 2.8L Engine(E36), Coupe(E36), Roadster 1.9L(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36), Roadster(E36)
View related parts
BMW Z3 Left Headlight Assembly
Part Number: 63128386047
$1242.79 MSRP: $1626.09
You Save: $383.30 (24%)
Product Specifications
- Other Name: Left Headlight, White Turn Indicator; Composite Assembly
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1996-2002 BMW Z3 | 1.9L Engine(E36), 2.8L Engine(E36), Coupe(E36), Roadster 1.9L(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36), Roadster(E36)

BMW Z3 Headlight

The BMW Z3 Headlight allows drivers to carve through the night roads with clear confidence as it casts a focused beam that lights the path and lets everyone know that the driver is there. A modern composite Headlight sits flush with the body, trimming drag and grouping turn signal and running lamps into one stylish housing on the agile Z3 roadster. Early Z3 examples applied halogen bulbs in the Headlight for cost-effective illumination, while xenon HID and energy-smart LED sources have been welcomed over the following years to increase brightness and service life, in a development driven by BMW performance targets. Choosing the projector style Headlight sharpens the cutoff line and curbs glare and can be ringed with a halo for a dramatic daytime glow. Finishes like crystal clear, or platinum smoke give owners their own customization options without losing the precise factory fit that BMW engineering has promised. Each plug and play Headlight comes preassembled, so swapping units is fast and requires few tools. Even if over time the plastic lens is clouded up with sun and debris, with a new BMW component it becomes completely clear again and retains the classic Z3 look on every spirited drive.

If you are looking for OEM BMW Z3 Headlight, we highly recommend to shop with us. Not only do we offer budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW Z3 Headlight that come backed by the manufacturer's warranty.

BMW Z3 Headlight Parts Questions & Experts Answers

Left Headlight Assembly
63128386047
Q:
What steps should be taken if one headlight only works on high or low beam on BMW Z3?
Posted by Rudolph K.
A:
If a car has an operational only high beam or low beam headlight, there will be battery voltage at the headlight electrical connector; change the headlight assembly or bulb where there is available. If voltage is not present the problem must be worked out according to the headlight wiring diagram. If the headlight does not work both high or low beam then apply voltage and ground at the headlight electrical connector. If voltage is present, check also the headlight connector ground terminal for a good connection to ground. If battery voltage and ground are present the repairer should replace either the headlight assembly or bulb if can be done separately. If headlight voltage failed or if head light ground failed then check the wiring diagram of headlight. Also, check and test the headlight switch and replace it if it has a bad or malfunctions in its performance. When lights are very poor or non existent, test for battery voltage and ground at the headlight electrical terminal. In case there is voltage present, check the ground circuit for the headlamp electrical connector and clean and repair as the case may be. If the voltage at this point if lower than that of the battery attach a multimeter between the headlight electrical connector and the headlight wiring diagram to determine the position where the voltage dropped.
Answered by BMW Parts Specialist Adrian / Jun 19, 2025