← View Generic B1874 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2018 BMW X5

B1874: B1874: Door Locks 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

⚠️

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 B1874 Mean on 2018 BMW X5?

This code indicates a malfunction in the door lock system, which may cause doors to lock or unlock unexpectedly, or fail to lock/unlock at all.

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Symptoms

• Doors lock/unlock randomly
• doors fail to lock/unlock
• door lock switch malfunctions

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Common Causes

• Faulty door lock actuator
• wiring issue
• faulty door lock switch
• faulty body control module

🛠️

How to Fix B1874 on 2018 BMW X5

1. Check door lock actuator for proper operation and replace if faulty. 2. Inspect wiring for damage or corrosion and repair/replace as needed. 3. Test door lock switch and replace if faulty. 4. Update body control module software if necessary.

🔧

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Parts for 2018 BMW X5

Door lock actuator Shop ↗ Wiring harness Shop ↗ Door lock switch Shop ↗ Body control module Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B1874

B1872 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