What Size Bulbs Does a 1998 BMW 318is 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 1998 BMW 318is Have?
The 1998 BMW 318is 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 318is has been available from 1991 to 1999, and the 1998 model falls in the late-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 1998 BMW 318is?
To upgrade the 1998 BMW 318is 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 1998 BMW 318is
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
1998 BMW 318is 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 | 7528 LED | Buy 7528 LED |
Turn Signal Front | 5007 LED | Buy 5007 LED |
Turn Signal Rear | 7506 LED | Buy 7506 LED |
Dome Light | 6411 | Buy 6411 |
License Plate | 6418 | Buy 6418 |
Parking Light | 2825 | Buy 2825 |
Reverse Light | 7506 | Buy 7506 |
Trunk Light | 6418 | Buy 6418 |
Want to upgrade everything at once?
Shop Complete LED Kit for 1998 BMW 318isHow Long Do 1998 BMW 318is Headlight Bulbs Last?
Standard halogen headlights on the 1998 BMW 318is 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 28 years old, the original bulbs on your 318is 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 1998 BMW 318is?
The 9006 low beam bulb on the 1998 BMW 318is 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.
1998 BMW 318is Headlight FAQ
Did BMW 318is Bulb Sizes Change Over the Years?
Over its production run from 1991 to 1999, the BMW 318is has seen bulb size changes in the Low Beam, High Beam and Fog Light positions. The 1998 model uses the newer bulb specification introduced around 1998. Always verify the exact bulb size for your specific 1998 model year using the chart above, as using the wrong size can result in poor fitment or reduced light output.
Other 318is 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: