What Size Bulbs Does a 1993 BMW 850Ci Use?
Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.
Installation Difficulty
Hard (Tight clearances)
Est. Replacement Cost
$15 - $40 (Halogen) / $30+ (LED)
What Lighting System Does the 1993 BMW 850Ci Have?
The 1993 BMW 850Ci features an extensive lighting system with 12 bulb positions. It uses halogen technology with 9006 LED low beams and 9005 LED high beams in a dual-bulb configuration. The 850Ci has been available from 1993 to 1997, and the 1993 model falls in the early-generation years. As a BMW vehicle, it uses a CANbus electrical system that monitors bulb status.
LED Flicker Warning
This vehicle (BMW) is known to use a CANbus system that checks for burnt-out bulbs. Installing standard LEDs may cause them to flicker or trigger a dashboard error.
We highly recommend using a CANbus decoder or "Anti-Flicker" resistors.
Can You Put LED Bulbs in a 1993 BMW 850Ci?
To upgrade the 1993 BMW 850Ci headlights to LED, you will need a 9006 LED LED kit for the low beams and a 9005 LED LED kit for the high beams. Start with the low beams since they are used most often and have the biggest impact on nighttime visibility. Important: BMW vehicles use a CANbus system that detects bulb wattage. Standard LED bulbs may trigger dashboard warnings or flicker. Choose LED kits labeled "CANbus-compatible" or add inline decoder resistors to prevent these issues. For the fog lights, a H1 LED LED bulb provides a clean white output that pairs well with LED headlights.
How to Replace Bulbs on a 1993 BMW 850Ci
The 9006 bulb uses a push-and-twist L-shaped bayonet lock. To remove the old bulb, disconnect the wiring harness first, then twist the bulb counter-clockwise and pull it out. BMW vehicles are known for tight engine bay clearances around the headlight assembly. You may need to remove the air intake duct, battery cover, or wheel well liner to access the bulbs. Budget 30 to 45 minutes per side for your first replacement. When installing the new bulb, avoid touching the glass with bare fingers. Skin oils create hot spots that shorten bulb life. Wear clean gloves or handle the bulb by its plastic base only. The fog lights are accessed from underneath the front bumper. You may need to remove a few plastic clips or screws from the fender liner to reach the H1 LED fog light socket.
Full Upgrade Bundle
Upgrade All 12 Positions at Once
1993 BMW 850Ci Complete Bulb Size Chart
| Position | Bulb Size | Shop |
|---|---|---|
Low Beam | 9006 LED | Buy 9006 LED |
High Beam | 9005 LED | Buy 9005 LED |
Fog Light | H1 LED | Buy H1 LED |
Brake Light | 7506 LED | Buy 7506 LED |
Side Marker | 5007 LED | Buy 5007 LED |
Turn Signal Front | 7506 LED | Buy 7506 LED |
Turn Signal Rear | 7506 LED | Buy 7506 LED |
Dome Light | 6411 | Buy 6411 |
License Plate | 6418 | Buy 6418 |
Parking Light | 7528 | Buy 7528 |
Reverse Light | 7506 | Buy 7506 |
Trunk Light | 6411 | Buy 6411 |
Want to upgrade everything at once?
Shop Complete LED Kit for 1993 BMW 850CiHow Long Do 1993 BMW 850Ci Headlight Bulbs Last?
Standard halogen headlights on the 1993 BMW 850Ci have an expected lifespan of 500 to 1,000 hours, which works out to roughly 2 to 3 years of normal use. Signs of a failing halogen bulb include noticeably dimmer output, a yellowish tint compared to the other headlight, or intermittent flickering. At 33 years old, the original bulbs on your 850Ci are likely overdue for replacement. Even if they still illuminate, reduced brightness significantly impacts nighttime safety. When one headlight burns out, replace both sides at the same time. Bulbs from the same batch age at similar rates, and mismatched brightness is distracting to oncoming drivers.
What Bulbs Are Compatible with the 1993 BMW 850Ci?
The 9006 low beam bulb on the 1993 BMW 850Ci is cross-compatible with HB4 bulbs. These share the same physical base and electrical connection, so they will fit the socket. However, 9006 is the recommended size because it is optimized for the wattage and beam pattern designed into your headlight housing. For the high beams, the 9005 is interchangeable with HB3. Using the wrong bulb size can cause improper beam patterns that reduce your visibility and blind other drivers. It can also cause overheating inside the headlight housing, potentially warping the plastic lens or reflector. Always verify the bulb number before purchasing.
1993 BMW 850Ci Headlight FAQ
Did BMW 850Ci Bulb Sizes Change Over the Years?
The BMW 850Ci has maintained consistent bulb sizes across all model years from 1993 to 1997. The low beam has used a 9006 LED bulb throughout, which means replacement parts and LED upgrade kits are widely available and well-tested for this model. If you find a deal on bulbs for any 850Ci year in this range, they will fit your 1993 model.
Other 850Ci Years
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Other Vehicles That Use 9006 LED Bulbs
These vehicles from other makes also use a 9006 LED low beam bulb: