← View Generic B1155 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2018 BMW X5
B1155: B1155: Power Window Switch Circuit Malfunction
on 2018 BMW X5
Fix Cost
$100 - $300
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
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 B1155 Mean on 2018 BMW X5?
The power window switch circuit has malfunctioned, causing the windows to malfunction or not function at all.
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Symptoms
- • Windows do not move
- • intermittent window movement
- • or multiple windows malfunctioning
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Common Causes
- • Faulty power window switch
- • wiring issue
- • or faulty window regulator
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How to Fix B1155 on 2018 BMW X5
1. Disconnect the battery to reset the system. 2. Check and repair or replace the power window switch. 3. Inspect and repair or replace the wiring. 4. Check and repair or replace the window regulator.
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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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Essential Tool
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Related Diagnostic Codes
Other codes that may appear with B1155
B1153
Sequential Code
B1153: Climate Control Actuator Malfunction
Medium
B1154
Sequential Code
B1154: Door Locks Malfunction
Medium
B1156
Sequential Code
B1156: Seat Switch Circuit Malfunction
Medium
B1157
Sequential Code
B1157: Exterior Lighting 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