Knock Sensor Repair Cost Guide
Single Knock Sensor Replacement
Labor Time: 1-2 hours
Labor Cost: $125-$250
Parts Cost: $50-$150
Total Estimated Cost: $175-$400
Dual Knock Sensor Replacement
Labor Time: 2-3 hours
Labor Cost: $250-$375
Parts Cost: $100-$300
Total Estimated Cost: $350-$675
Bank-Specific Knock Sensor Replacement
Labor Time: 1.5-2.5 hours
Labor Cost: $187-$312
Parts Cost: $75-$200
Total Estimated Cost: $262-$512
Note: Prices may vary depending on vehicle make, model, and year. Some luxury vehicles may require more expensive OEM parts. Additional costs may apply if related components need replacement.
Additional Considerations:
- Diagnostic Fee: $125 (Usually applied to repair if performed)
- Wiring Harness Repair (if needed): $150-$300 additional
- ECU Reprogramming (if required): $100-$200 additional
Knock Sensor Repair Procedure Guide
Bank 1 Knock Sensor Repair
Tools Required:
- Socket set
- Torque wrench
- Wire brush
- Anti-seize compound
Steps:
- Locate the Bank 1 knock sensor on the engine block (typically on the driver's side)
- Disconnect the negative battery terminal
- Unplug the electrical connector from the knock sensor
- Remove any components blocking access to the sensor
- Clean the area around the sensor to prevent debris from falling into the mounting hole
- Remove the mounting bolt and old sensor
- Clean the mounting surface with a wire brush
- Apply a small amount of anti-seize compound to the new sensor's threads
- Install the new sensor and torque to manufacturer specifications
- Reconnect the electrical connector
- Reinstall any removed components
- Reconnect the battery
Bank 2 Knock Sensor Repair
Tools Required:
- Socket set
- Torque wrench
- Wire brush
- Anti-seize compound
- Extension bars (may be needed for access)
Steps:
- Locate the Bank 2 knock sensor on the engine block (typically on the passenger side)
- Disconnect the negative battery terminal
- Remove necessary components for access (often more components need to be removed than Bank 1)
- Unplug the electrical connector from the knock sensor
- Clean the area around the sensor
- Remove the mounting bolt and old sensor
- Clean the mounting surface thoroughly
- Apply anti-seize compound to the new sensor's threads
- Install the new sensor and torque to manufacturer specifications
- Reconnect the electrical connector
- Reinstall all removed components
- Reconnect the battery
Important Notes:
- Always refer to your vehicle's service manual for exact torque specifications
- Ensure the mounting surface is completely clean before installing the new sensor
- Check for damaged wiring while replacing the sensor
- Clear any diagnostic trouble codes after replacement
- Test drive the vehicle to ensure proper operation
Note: This repair procedure may vary depending on your vehicle's make, model, and year. Some vehicles may require additional steps or special tools.
Understanding Knock Sensors
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Common Failure Symptoms of Knock Sensors
Knock Sensor Failure Signs and Service Information
Common Signs of Knock Sensor Failure:
- Check Engine Light illumination
- Engine pinging or knocking sounds
- Poor acceleration or reduced engine performance
- Decreased fuel efficiency
- Rough idling or hesitation during acceleration
- Engine running rough, especially under load
Service Schedule and Maintenance:
Unlike many other sensors, knock sensors don't have a specific replacement interval. They are considered "lifetime" components that should last the life of the vehicle. However:
- Regular inspection during routine maintenance is recommended
- Testing should be performed if any of the above symptoms occur
- Wiring harness should be inspected for damage every 60,000 miles
- Replacement is typically only necessary if:
- Sensor has failed diagnostics test
- Physical damage is present
- Wiring has deteriorated
Important Note: If you experience any symptoms of knock sensor failure, it's crucial to have it diagnosed promptly. Continuing to drive with a faulty knock sensor can lead to serious engine damage due to uncontrolled detonation.
Regular maintenance checks can help identify potential knock sensor issues before they become serious problems. Contact our service department for professional diagnosis and repair.
How It Works
- Get a quote online or set-up a time to have your vehicle looked at.
- Pick time slots that work for you, easily, online.
- We will confirm appointments and send reminders.
- Our mechanics bring everything that is needed to you.
- All you have to do is provided a safe area for the work to be performed.
What we need from you
- A safe place to work on your vehicle
- No working on the side of busy roads
- No working on unstable or steep surfaces.
- We do not perform repairs during severe weather.
- Authorization from a property owner or management.
- Repair work done in a parking lot or at your requires permission.
- We do not do repairs in areas restricted by law.
Common Questions
Service Area
Our primary service area is greater Grand Rapids and includes Comstock Park, East Grand Rapids, Grandville, Kentwood, Walker, and Wyoming
Our secondary service area is provided by our Belding location and includes: Belding, Greenville, Ionia and the sorrounding areas.
Contact us if you have any questions about where we provide services.
