← View Generic B1205 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2018 BMW X5
B1205: B1205: Turn Signal Lamp 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
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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 B1205 Mean on 2018 BMW X5?
The B1205 code indicates a malfunction in the turn signal lamp circuit, which can cause the turn signals to malfunction or not function at all.
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Symptoms
- • Turn signals not working
- • flashing
- • or staying on continuously
- • warning lights on dashboard
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Common Causes
- • Faulty turn signal switch
- • corroded or damaged wiring
- • blown fuse
- • or malfunctioning turn signal module
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How to Fix B1205 on 2018 BMW X5
1. Check and replace the turn signal switch if faulty. 2. Inspect and clean or replace corroded wiring. 3. Check and replace the fuse if blown. 4. Replace the turn signal module if malfunctioning.
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Need Maintenance Info for Your X5?
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Related Diagnostic Codes
Other codes that may appear with B1205
B1203
Sequential Code
B1203: Power Window Circuit Malfunction
Medium
B1204
Sequential Code
B1204: Seat Position Sensor Circuit Malfunction
Medium
B1206
Sequential Code
B1206: Immobilizer System Malfunction
Medium
B1207
Sequential Code
B1207: 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