The BMW Brake Pad Wear Sensor for the front left (part number 34356792289) acts as an early warning system for brake pad deterioration. When the brake pads start to wear down, this sensor alerts the driver, prompting timely replacements. This ensures that the vehicle maintains optimal braking efficiency, enhancing safety for both the driver and passengers.
By monitoring the condition of the brake pads and preventing excessive wear, this sensor is a critical component in averting potential brake failures and maintaining the overall safety and performance of the vehicle.
Dimensions: 9.9 x 6.6 x 2.1 inches (25.1 x 16.8 x 5.3 cm)
Weight: 0.40 pounds (0.18 kg)
Materials: Typically made from plastic and metal components for durability and accurate wear detection
Compatibility: Fits various BMW models including:
2012-2020 BMW 3 Series (e.g., 320i, 328i, 335i)
2012-2020 BMW 4 Series (e.g., 428i, 435i)
2012-2020 BMW 5 Series (e.g., 528i, 535i)
2012-2020 BMW 6 Series (e.g., 640i)
2012-2020 BMW 7 Series (e.g., 740i)
2012-2020 BMW X Series (e.g., X3, X5, X6)
Other Names: Sensor, Wear Indicator, Wear Sensor
Position: Front Driver Side
Manufacturer: BMW
Part Number: 34356792289
Condition: New
Fitment Type: Direct replacement
Warranty: Guaranteed by BMW’s factory warranty
Gather necessary tools: Jack and jack stands, lug wrench, ratchet and socket set, flat-head and Phillips screwdrivers, needle nose pliers, wire cutter (if necessary).
Precautions: Ensure the vehicle is on a flat surface, engage the parking brake, and use wheel chocks. Wear safety gloves and eye protection.
Lift the vehicle: Use the jack to lift the front left side of the vehicle and secure it with jack stands.
Remove the wheel: Use the lug wrench to loosen and remove the lug nuts, then take off the wheel.
Access the sensor: Remove the fender liner to access the connector box under the wheel.
Disconnect the old sensor: Open the clips and disconnect the old sensor from the connector box and the brake pad.
Remove the old sensor: Take out the old sensor from the holders and the metal clip.
Install the new sensor: Place the new sensor in the reverse order, securing it with the holders and the metal clip.
Reconnect the sensor: Connect the new sensor to the connector box and close the clips.
Reinstall the fender liner: Put the fender liner back in place and secure it with screws.
Reinstall the wheel: Put the wheel back on and tighten the lug nuts in a star pattern using the lug wrench.
Lower the vehicle: Carefully lower the vehicle back to the ground using the jack.
Test the sensor: Start the vehicle and check the brake pad wear indicator on the dashboard to ensure the new sensor is functioning properly.
Regular Inspection: Check the brake pad wear sensor regularly for any signs of damage or wear. Replace it if it shows any signs of wear or damage.
Clean the Sensor Area: Keep the area around the sensor clean from dirt and debris to ensure accurate readings.
Proper Installation: Ensure the sensor is installed correctly and securely. Improper installation can lead to false warnings or sensor failure.
Use Genuine Parts: Always use genuine BMW brake pad wear sensors to ensure compatibility and optimal performance.
Monitor Brake Pads: Keep an eye on the condition of your brake pads.
Replace them when they start to wear down to avoid damaging the sensor.
Follow Manufacturer Guidelines: Adhere to BMW’s maintenance schedule and guidelines for replacing the brake pad wear sensor and brake pads.
Professional Maintenance: Have your vehicle inspected by a professional mechanic regularly to ensure the sensor and braking system are functioning properly.
Common issues:
False warning light: The brake pad wear sensor may trigger the warning light even when the brake pads are not worn out.
Sensor not detecting wear: The sensor fails to detect brake pad wear and does not trigger the warning light.
Sensor damage: The sensor can get damaged or broken during brake pad replacement or other maintenance work.
Electrical issues: Faulty wiring or poor connections can cause the sensor to malfunction.
Troubleshooting steps:
Check sensor alignment: Ensure the sensor is properly aligned with the brake rotor.
Inspect sensor wiring: Look for any damaged or loose wiring and secure connections.
Test sensor functionality: Use a multimeter to check for continuity in the sensor circuit.
Replace sensor if necessary: If the sensor is damaged or faulty, replace it with a new one.
Reset warning light: After addressing the issue, reset the warning light using the vehicle’s diagnostic tool or by following the manufacturer’s instructions.
The BMW Brake Pad Wear Sensor for the front left (part number 34356792289) is an essential component that ensures optimal braking efficiency and enhances safety by alerting drivers to brake pad deterioration.
It monitors brake pad condition, preventing excessive wear and potential brake failures. The sensor fits various BMW models from 2012-2020, including the 3 Series, 4 Series, 5 Series, 6 Series, 7 Series, and X Series.
Regular inspection and proper installation are crucial to ensure accurate readings and prevent false warnings or sensor failure. Common issues include:
Troubleshooting steps involve checking sensor alignment, inspecting wiring, testing sensor functionality, replacing the sensor if necessary, and resetting the warning light.
