← View Generic B1373 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2018 BMW X5

B1373: B1373: Illumination Malfunction

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
⚠️

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 B1373 Mean on 2018 BMW X5?

The B1373 code indicates a problem with the vehicle's lighting system, such as a faulty headlight, taillight, or brake light.
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Symptoms

  • • Dim or non-functioning headlights
  • • taillights
  • • or brake lights
  • • or a combination of these.
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Common Causes

  • • Faulty headlight or taillight bulb
  • • wiring issue
  • • or a problem with the body control module.
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How to Fix B1373 on 2018 BMW X5

1. Check and replace the faulty bulb(s). 2. Inspect and repair any damaged wiring. 3. Update the body control module's software if necessary.

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Need Maintenance Info for Your X5?

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Parts for 2018 BMW X5

headlight bulb Shop ↗ taillight bulb Shop ↗ wiring harness Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B1373

B1371 Sequential Code

B1371: Power Window Regulator Malfunction

Medium
B1372 Sequential Code

B1372: Seat Switch Circuit Malfunction

Medium
B1374 Sequential Code

B1374: Body System Security Malfunction

Medium
B1375 Sequential Code

B1375: Audio System Fault

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