2 Years Available
BMW 645ci Light Bulb Sizes
Complete bulb size reference for the BMW 645ci from 2004 to 2005. Find headlight, fog light, turn signal, and brake light bulb sizes for every model year.
Every BMW 645ci from 2004 to 2005 uses the same HID-D2S LED low beam bulb — once you confirm your year is within this range, you only need one part number.
Year Range
2004 – 2005
2 model yearsBulb Sizes Across Years
| Position | Bulb Type(s) | Years | Status |
|---|---|---|---|
| Low Beam | HID-D2S LED(2004–2005) | 2 years | Consistent |
| High Beam | H7 LED(2004–2005) | 2 years | Consistent |
| Fog Light | 9006 LED(2004–2005) | 2 years | Consistent |
| Brake Light | LED Bulb(2004–2005) | 2 years | Consistent |
| Side Marker | LED Bulb(2004–2005) | 2 years | Consistent |
| Turn Signal Front | 2827 LED(2004–2005) | 2 years | Consistent |
| Turn Signal Rear | 12496 LED(2004–2005) | 2 years | Consistent |
| Dome Light | 6418(2004–2005) | 2 years | Consistent |
| License Plate | 2825(2004–2005) | 2 years | Consistent |
| Map Light | 6486X(2004–2005) | 2 years | Consistent |
| Reverse Light | 7506(2004–2005) | 2 years | Consistent |
| Trunk Light | 6418(2004–2005) | 2 years | Consistent |
Common 645ci Replacement Parts
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Frequently Asked Questions
We have bulb size data for the BMW 645ci from 2004 to 2005, covering 2 model years. Select your year below for a complete position-by-position bulb chart.
No, the BMW 645ci has used the HID-D2S LED low beam bulb consistently across all 2 model years in our database. Any year in the 2004–2005 range uses the same bulb.
The BMW 645ci uses a HID-D2S LED bulb for the low beam and a H7 LED for the high beam, and a 9006 LED for the fog lights. Select your year below for the exact fitment chart.
Yes. The BMW 645ci uses a HID-D2S LED low beam, and direct-fit LED conversion kits for that size are widely available. LED upgrades typically produce 2–3× more light output than stock halogen and last 25,000+ hours. Look for a DOT-compliant kit with a proper beam cutoff pattern.
Select your model year from the list below. Each year page shows every bulb position — low beam, high beam, fog light, turn signal, and brake light — with the correct size and a link to buy it on Amazon.