2009 - 2016 BMW Z4 HID Headlight Ballast (OEM)

What to look for when buying:

• Compatibility: Ensure the ballast is designed for your vehicle's year and model.
• Reputation: Buy from a reputable source with good reviews.
• Warranty: Check if the ballast comes with a warranty.
• Condition: Decide whether you want a used, refurbished, or new aftermarket part.

Quality indicators:

• OEM markings: If buying used or refurbished OEM, look for the original manufacturer's markings.
• Testing: Ask if the ballast has been tested to ensure it's working properly.
• Materials: Check for high-quality components and construction.

What's typically included:

• The ballast unit itself.
• Sometimes mounting hardware (screws or bolts).
• Instructions may or may not be included.

Difficulty level and estimated time:

• Difficulty: Medium
• Estimated time: 30 minutes to 1 hour

Special tools needed:

• Screwdrivers (various sizes)
• Socket set
• Pliers
• Possibly Torx bits depending on the vehicle

Critical steps and tips:

1. Disconnect the battery: This is crucial for safety.
2. Locate the ballast: It's usually mounted near the headlight assembly.
3. Remove the headlight assembly: This may be necessary to access the ballast.
4. Disconnect the wiring: Carefully disconnect the wires from the old ballast.
5. Install the new ballast: Connect the wires and mount the new ballast securely.
6. Reinstall the headlight assembly: If you removed it, put it back in place.
7. Reconnect the battery: And test the headlights.

DIY or professional installation:

• DIY is possible for mechanically inclined individuals.
• Professional installation is recommended if you're not comfortable working with electrical components.

Compare: Used OEM, Refurbished OEM, New Aftermarket

• Used OEM: These are original parts from the vehicle manufacturer.
• Refurbished OEM: These are original parts that have been repaired and restored.
• New Aftermarket: These are new parts made by a third-party manufacturer.

Used OEM:

• Best value option.
• Genuine factory parts.
• Tested and inspected.
• Significantly lower prices.

Refurbished OEM:

• Factory parts professionally restored.
• New components are often used during the refurbishment process.
• Can be a good balance of price and reliability.

New Aftermarket:

• Brand new parts.
• Built to OE specifications.
• Can be a reliable option, but quality can vary between brands.

Parts commonly replaced or checked:

• HID bulbs
• Headlight assembly
• Wiring harness

Why replace related parts:

• Replacing the bulbs at the same time ensures they are both the same age and brightness.
• Checking the wiring harness can identify any potential issues that could damage the new ballast.
• Replacing a damaged headlight assembly can prevent moisture from damaging the ballast.

How long this part normally lasts:

• Typically 5-10 years.

Factors that affect longevity:

• Quality of the part
• Environmental conditions (moisture, heat)
• Driving habits
• Electrical system health

Budget vs mid-range vs premium options:

• Used OEM: $50 - $150
• Refurbished OEM: $100 - $200
• New Aftermarket: $80 - $250

Labor cost considerations:

• Professional installation can add $50 - $200 to the total cost.

Total job cost estimates:

• DIY: $50 - $250 (depending on the part chosen)
• Professional installation: $100 - $450 (depending on the part and labor rate)

Known issues:

• Some models are prone to moisture intrusion in the headlight assembly, which can damage the ballast.
• Certain models may experience voltage fluctuations that can shorten the lifespan of the ballast.

TSBs or common complaints:

• Check for any Technical Service Bulletins (TSBs) related to headlight issues on your specific vehicle model.
• Research common complaints online to see if other owners have experienced similar problems.

How to confirm proper operation:

• Turn on the headlights and verify that both are working.
• Check for consistent brightness and color.

What to look/listen for:

• No flickering or blinking.
• No error messages on the dashboard.
• Headlights should turn on immediately.
• Listen for any unusual buzzing or humming sounds from the ballast.

Q: How do I know if it's the bulb or the ballast that's bad? A: Try swapping the bulbs between the headlights. If the problem switches sides, it's the bulb. If the problem stays on the same side, it's likely the ballast.

Q: Can I replace the ballast myself? A: Yes, if you're comfortable working with car electronics. Make sure to disconnect the battery first.

Q: What does OEM mean? A: OEM stands for Original Equipment Manufacturer. It means the part was originally made by the company that made the part for the vehicle when it was new.

Q: Will any ballast work with my vehicle? A: No, you need to make sure the ballast is compatible with your vehicle's year, make, and model.

Q: How long will a used ballast last? A: It's hard to say exactly, but a used OEM ballast can last for several years if it's in good condition. It depends on how well it was maintained and how many miles it has on it.

OEM Part Numbers:

• BMW: 63117237647, 63117318327, 63127172536, 63127250624, 7237647

Fits Years: 2009 2010 2011 2012 2013 2014 2015 2016