← View Generic B0804 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2018 BMW X5
B0804: B0804: Seat Switch Circuit Malfunction
on 2018 BMW X5
Fix Cost
$100 - $500
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 B0804 Mean on 2018 BMW X5?
The B0804 code indicates a malfunction in the seat switch circuit, which controls the seat's position, lumbar support, or recline function.
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Symptoms
- • Seat position or function not working correctly
- • lumbar support or recline not adjusting
- • or seat warning light illuminated.
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Common Causes
- • Faulty seat switch
- • wiring issue
- • or seat control module failure.
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How to Fix B0804 on 2018 BMW X5
1. Disconnect the battery to reset the system. 2. Check and clean the seat switch contacts. 3. Replace the seat switch if faulty. 4. Inspect and repair any damaged wiring. 5. Replace the seat control module if faulty.
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Need Maintenance Info for Your X5?
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Related Diagnostic Codes
Other codes that may appear with B0804
B0802
Sequential Code
B0802: Door Locks Actuator Circuit Malfunction
Medium
B0803
Sequential Code
B0803: Power Window Regulator Malfunction
Medium
B0805
Sequential Code
B0805: Malfunction in Exterior Lighting Circuit
Medium
B0806
Sequential Code
B0806: Body System Security 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