Left Headlight Ballast Module for BMW 1 Series F20 Replaces 7316145
Restore reliable D1S HID illumination when your left headlight begins flickering or failing with this direct-fit ballast module engineered specifically for the BMW 1 Series F20 and F21 platform. Precisely calibrated to replace degraded original equipment units, it stabilizes voltage delivery to your projector lens and eliminates common high-beam dropout issues. This aftermarket component restores factory-level beam focus and nighttime visibility without requiring wiring adapters or ECU coding.
Benefits & Practical Tips
- Verify your existing unit matches one of the referenced OE codes before purchasing to guarantee seamless hardware alignment.
- Route the connector away from exhaust manifolds or hot brake components, as sustained heat exposure degrades internal capacitors over time.
- Professional installation is highly recommended to preserve headlight gasket seals and prevent accidental damage to fragile D1S bulb sockets.
Technical Specifications
- Replacement Part Numbers: 7316145 / 636212803 / 01 3287775
- OEM Compatibility Codes: 63117316145 / 63117304063 / 63117305238 / 7304063 / 7305238
- Connector Interface: D1S semi-type plug
- Fitment Coverage: BMW 1 Series F20 (Hatchback) and F21 (Coupe), model years 2010 through 2019
- Condition: Brand new, factory bench-tested, free of high-concern hazardous chemicals
Package includes:
- 1× Left Headlight Ballast Module
Important Reminders
Installation instructions are not included with this replacement part. Manual measurement tolerances of 1-2mm and screen calibration differences may result in slight aesthetic variations compared to reference photography. Always disconnect the negative battery terminal prior to electrical service to prevent control module errors.
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