Cost-effective Engine Camshaft Position Sensor O-Ring 12141748398 For BMW Engine Seals 

1. Product Overview

   The BMW Engine Camshaft Position Sensor O-Ring (Part No. 12141748398) is a high-precision rubber sealing component specifically designed for BMW vehicles. It ensures a tight seal between the camshaft position sensor and the engine cylinder head, preventing oil leaks and the intrusion of dust and contaminants.

2. Vehicle Compatibility Table

Note: Always verify compatibility using VIN or consult BMW ETK

3. Functions & Purpose

• Leak Prevention – Stops engine oil from seeping around the camshaft position sensor.

• Contaminant Protection – Blocks dust, moisture, and debris from entering the sensor, ensuring accurate signal transmission.

• High-Temperature & Oil Resistance – Made from high-quality fluoroelastomer (FKM) or nitrile rubber (NBR), capable of withstanding engine heat and oil exposure.

4. Product Features

• OEM Quality – Meets BMW OE standards for perfect compatibility.

• Precision Dimensions – Inner diameter, outer diameter, and cross-section strictly match factory specifications.

• Long-Lasting Durability – Resistant to aging and deformation, maintaining elasticity over time.

5. Common Failure Symptoms

If this O-ring wears out or gets damaged, the following issues may occur:

• Oil Leaks – Visible oil residue around the sensor.

• Check Engine Light – Fault codes like P0340/P0341 due to signal interference.

• Hard Starting or Rough Idling – Inaccurate camshaft timing affecting ignition.

6. Replacement Recommendations

• When to Replace – Recommended when removing the camshaft position sensor or if oil leakage is detected.

• Installation Tips

  • Clean the sealing groove and apply a thin layer of oil for lubrication.

  • Avoid twisting or overstretching the O-ring.