← View Generic B1120 Guide Severity: High

🚗 Vehicle-Specific Guide

This guide is customized for your 2018 BMW X5

B1120: B1120: Airbag System Fault

on 2018 BMW X5

Fix Cost

$200 - $1000

Parts & Labor

Difficulty

4/5

1-2 hours

DIY Possible?

❌ No

Pro recommended

Your Vehicle

2018 BMW

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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 B1120 Mean on 2018 BMW X5?

The B1120 code indicates a fault in the airbag system, which may prevent the airbags from deploying in the event of a crash. This code is often accompanied by other airbag-related codes.

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Symptoms

• Airbag warning light on dashboard
• airbag system malfunction
• crash sensor issues

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Common Causes

• Faulty crash sensor
• wiring issue
• airbag module malfunction
• faulty airbag inflator module

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How to Fix B1120 on 2018 BMW X5

1. Check the crash sensor for damage or corrosion and replace if necessary. 2. Inspect the wiring harness for damage or corrosion and repair or replace as needed. 3. Replace the airbag module if faulty. 4. Replace the airbag inflator module if faulty.

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Parts for 2018 BMW X5

Crash sensor Shop ↗ Wiring harness Shop ↗ Airbag module Shop ↗ Airbag inflator module Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1120

B1118 Sequential Code

💡 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