Is it dangerous to drive with a faulty ballast?

Yes, an unreliable or dim headlight significantly reduces your visibility and how well other drivers can see you at night — repair promptly.

Should the bulb be replaced along with the ballast?

It’s worth checking the bulb’s condition at the same time, since bulb and ballast faults can produce similar symptoms and are sometimes related.

What is the ballast made of?

An electronic circuit board that steps up voltage, housed in a sealed metal or plastic casing.

What is this part and what does it do?

Full description available in the product description section above. Contact us with clarifying questions.

How do I tell if my part is faulty?

See the 'Signs of a faulty part' section above or run a diagnostic at an auto service.

Yes - all our used parts are tested before sale and sold with guaranteed quality.

When should the part be replaced?

When warning signals appear, diagnostic codes are present, or the system malfunctions.

Xenon control unit BMW 520D F11 2011 TOURING

Name: Xenon control unit BMW 520D F11 2011 TOURING
Brand: BMW
SKU: 987092264 V20-84-0018 63117182520
Price: 72.00 EUR
Availability: InStock

OEM: 987092264 V20-84-0018 63117182520

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

What is this part and why does it matter?

The xenon ballast (HID ballast) supplies the high voltage needed to ignite and sustain the arc inside a xenon headlight bulb.

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Not sure about compatibility? Send us a question with your car's make, model and year.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Headlight flickering or a delay before the light reaches full brightness
Headlight not lighting at all on one side
Light with a strange colour tint (bluish or pinkish) compared to the other side

Installation information

Mounted near the headlight, connected to the bulb and vehicle wiring harness — always handle with care, as it generates very high voltage.

Donor vehicle description

VIN: WBAMX11090DU38698
Make, model: BMW 520 F11 520D
Year: 2011
Engine: Diesel 2.0L 135KW - N47T
Transmission: Automatic
Drive: HECK
Equipment: LHD
Colour: HAVANNA METALLIC (A17)

358 parts from this car

Frequently asked questions

A failing ballast can struggle to maintain a stable arc within the bulb, causing visible flickering or colour shifts before it stabilises, if it stabilises at all.

What our customers say

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Price: affordable. Service: electrical equipment repair.
A
Andris B.
September 2026
Price: excellent.
D
Didier V.
August 2026
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
I
Ilmars K.
August 2026
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
A
Aleksandr L.
Toyota Avensis
August 2026
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
P
Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
N
Natālija I.
May 2026
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
J
Juris J.
February 2026
Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!
E
Egor S.
November 2025
Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.
I
Igors K.
Front fender
October 2025