← View Generic C1420 Guide
Severity: Medium
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Vehicle-Specific Guide
This guide is customized for your 2018 BMW X5
C1420: C1420: Wheel Speed Sensor 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
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 C1420 Mean on 2018 BMW X5?
The wheel speed sensor malfunction code indicates a problem with the wheel speed sensor circuit, which can cause issues with the anti-lock braking system (ABS) and traction control system (TCS).
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Symptoms
- • ABS and TCS warning lights on
- • vehicle may vibrate or pull to one side during braking
- • reduced traction control performance
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Common Causes
- • Faulty wheel speed sensor
- • wiring issues
- • sensor connector corrosion
- • faulty ABS/TCS module
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How to Fix C1420 on 2018 BMW X5
1. Check and clean the wheel speed sensor connector, 2. Inspect and replace the wheel speed sensor if damaged, 3. Check and repair any wiring issues, 4. Update the ABS/TCS module software if necessary
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Need Maintenance Info for Your X5?
Get oil capacity, filter specs, and torque settings for your specific 2018 BMW X5.
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Related Diagnostic Codes
Other codes that may appear with C1420
C1418
Sequential Code
C1418: Electronic Stability Control (ESC) Malfunction
Medium
C1419
Sequential Code
C1419: Traction Control System Malfunction
Medium
C1421
Sequential Code
C1421: ABS System Malfunction
Medium
C1422
Sequential Code
C1422: Brake System Pressure Sensor Circuit 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