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Bmw Alpina B7L Xdrive High Intensity Discharge (HID) Headlight Control Modules

Bmw Alpina B7L Xdrive High intensity discharge (hid) headlight control modules

Starting at $258.95, AutoBuffy stocks 1 HID headlight control modules from URO. The control module—also called a ballast—converts your vehicle's 12-volt supply into the high-voltage arc needed to ignite and sustain HID bulbs. When it fails, headlights flicker, go dark, or refuse to start, leaving you with degraded visibility and a potential safety and inspection issue.

Signs your Bmw Alpina B7L Xdrive needs a new HID headlight control module

  • One or both HID headlights fail to illuminate at startup despite a known-good bulb
  • Headlight flickers repeatedly or strobes at highway speed before going out
  • Light takes longer than usual to reach full brightness, or never reaches it
  • One side produces noticeably different color or intensity than the other, ruling out bulb mismatch
  • Headlight warning light or DTC related to the HID circuit appears on the dash
  • Headlight cuts out when hot and restores only after the vehicle cools down, pointing to a heat-stressed ballast

Which HID headlight control module should you buy for your Bmw Alpina B7L Xdrive?

The most important decision is whether to buy an OEM-equivalent unit matched to your Bmw Alpina B7L Xdrive's wiring harness and igniter configuration, or an aftermarket upgrade. You also need to confirm whether your application uses an integrated ballast-igniter or a separate igniter, since they are not interchangeable.

OEM-replacement (direct-fit)
Best for
Owners who want plug-and-play reliability with no modifications
What you get
Exact harness connector, matched wattage, and factory-calibrated startup voltage for your Bmw Alpina B7L Xdrive's bulb type
OEM-equivalent aftermarket
Best for
Budget-conscious buyers who still need a reliable, vehicle-specific fit
What you get
Lower price than dealer part, same connector and wattage spec, with varying warranty coverage by brand
Universal high-wattage ballast
Best for
Enthusiasts upgrading bulb wattage or retrofitting a projector housing
What you get
Adjustable or higher output (e.g., 35W→55W), but requires splicing and may shorten bulb life
Integrated ballast-igniter assembly
Best for
Vehicles where the OEM design combines both functions in one unit
What you get
Single-piece replacement that eliminates a common failure point between separate ballast and igniter connectors

High intensity discharge (hid) headlight control modules brands we stock for your Bmw Alpina B7L Xdrive

URO
1 option · from $258.95

Replacing the HID headlight control module on a Bmw Alpina B7L Xdrive

Moderate⏱ 1–2 hoursTrim removal tool or flathead screwdriver with tape-wrapped tipScrewdriver set (Phillips and flathead)Socket and ratchet setMultimeter (for pre- and post-install voltage verification)Nitrile gloves (HID systems carry dangerous stored voltage)

Before starting, disconnect the negative battery terminal and allow several minutes for stored voltage in the HID system to dissipate—ballasts can hold lethal charge even when the vehicle is off. Access typically requires removing the headlight assembly or working through the engine bay access panel; the ballast is usually mounted on the back or underside of the housing and secured with clips or bolts. Reconnect the harness until it clicks firmly, reinstall the assembly, reconnect the battery, and verify both headlights ignite and reach full brightness before closing up.

Frequently asked questions

How much does it cost to replace HID headlight control modules on a Bmw Alpina B7L Xdrive?
Parts start at $258.95 on AutoBuffy. A direct-fit OEM-equivalent module is typically the most cost-effective path. Add one to two hours of shop labor if you are not doing the job yourself. Dealer-sourced units can cost significantly more for the same electrical function.
How do I know if the ballast or the HID bulb is the problem on my Bmw Alpina B7L Xdrive?
Swap the suspect-side bulb with the working-side bulb. If the problem moves to the other headlight, the bulb is at fault. If the dead side stays dark, the control module or igniter is the likely cause. A multimeter check of ballast output voltage can confirm a failed module before purchasing parts.
Can a bad HID control module damage the bulb on a Bmw Alpina B7L Xdrive?
Yes. A failing ballast that delivers inconsistent voltage—especially voltage spikes during repeated restart attempts—can shorten bulb life significantly or cause premature arc-tube blackening. If your bulbs are burning out faster than expected, test or replace the control module before installing new bulbs to protect your investment.
Is it safe to drive my Bmw Alpina B7L Xdrive with one HID headlight out?
No. A single non-functioning headlight cuts your forward visibility roughly in half, increases your risk of not seeing road hazards, and is a moving violation in most jurisdictions. Replace the faulty control module promptly. Driving short distances in daylight is low risk, but night driving with a failed HID is not advisable.
Do I need to replace the igniter at the same time as the ballast on my Bmw Alpina B7L Xdrive?
Not always, but it is strongly recommended if either component has high mileage. The igniter and ballast work together under extreme voltage stress, and the two parts age at similar rates. Replacing both at once avoids a second labor session shortly after the first and ensures the new ballast is not immediately stressed by a failing igniter.
Will an aftermarket HID control module trigger a check-engine or warning light on my Bmw Alpina B7L Xdrive?
A quality direct-fit aftermarket module that matches OEM wattage and communication protocols typically does not trigger warning lights. Low-quality or mismatched-wattage units can set headlight circuit DTCs, especially on vehicles with active headlight monitoring systems. Check that the module is rated for the exact wattage and connector type specified for your Bmw Alpina B7L Xdrive.

Shop high intensity discharge (hid) headlight control modules by year for the Bmw Alpina B7L Xdrive

20122011

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