← View Generic B0789 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2018 BMW X5
B0789: B0789: Headlight Dim or Failure
on 2018 BMW X5
Fix Cost
$50 - $200
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
Your Vehicle
2018 BMW
X5
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Important for 2018 BMW X5 Owners
Before starting repairs, verify which engine your 2018 BMW X5 has. Check your VIN or engine code to ensure you order the correct parts.
📖 What Does B0789 Mean on 2018 BMW X5?
The B0789 code indicates a problem with the headlight circuit, possibly due to a faulty headlight relay, fuse, or wiring issue.
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Symptoms
- • Dim or failed headlights
- • intermittent headlight operation
- • or a warning light on the dashboard.
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Common Causes
- • Faulty headlight relay
- • blown headlight fuse
- • corroded or damaged wiring
- • or a malfunctioning headlight module.
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How to Fix B0789 on 2018 BMW X5
1. Check the headlight relay and replace it if faulty. 2. Inspect the headlight fuse and replace it if blown. 3. Inspect and clean the wiring and connectors. 4. Test the headlight module and replace it if faulty.
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Need Maintenance Info for Your X5?
Get oil capacity, filter specs, and torque settings for your specific 2018 BMW X5.
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Related Diagnostic Codes
Other codes that may appear with B0789
B0787
Sequential Code
B0787: Power Window Motor Control Circuit Malfunction
Medium
B0788
Sequential Code
B0788: Seat Position Sensor Circuit Malfunction
Medium
B0790
Sequential Code
B0790: Body System Security Malfunction
Medium
B0791
Sequential Code
B0791: Audio System Malfunction
Medium
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system