← View Generic B0771 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2018 BMW X5

B0771: B0771: Power Window Relay Circuit Malfunction

on 2018 BMW X5

Fix Cost
$50 - $150
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2018 BMW
X5
⚠️

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 B0771 Mean on 2018 BMW X5?

The power window relay circuit has malfunctioned, preventing the windows from functioning properly. This code is often accompanied by a warning light on the dashboard.
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Symptoms

  • • Windows won't roll up or down
  • • or do so intermittently
  • • with no warning light on the dashboard.
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Common Causes

  • • Faulty power window relay
  • • wiring issue
  • • or a problem with the window switch.
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How to Fix B0771 on 2018 BMW X5

1. Check the power window relay for any signs of damage or corrosion. Replace it if necessary. 2. Inspect the wiring harness for any signs of damage or wear. Repair or replace as needed. 3. Test the window switch to ensure it's functioning properly. Replace if necessary.

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Parts for 2018 BMW X5

Power window relay Shop ↗ Wiring harness Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B0771

B0769 Sequential Code

B0769: Climate Control Fan Malfunction

Medium
B0770 Sequential Code

B0770: Door Locks Actuator Malfunction

Medium
B0772 Sequential Code

B0772: Seat Adjustment Motor Fault

Medium
B0773 Sequential Code

B0773: 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