For a typical 2004 Honda CR-V, the knock sensor part itself usually costs about $60–$120. With labor, the total replacement often ranges from roughly $150 to $350, depending on whether your model uses one knock sensor or two and on local labor rates.
What a knock sensor does and why it matters
The knock sensor helps protect the engine by detecting abnormal combustion (engine knock) and relaying the information to the engine control unit. When a fault is detected, the ECU can adjust timing to prevent damage. If the sensor fails or its circuit is compromised, you may see warning codes such as P0330 (knock sensor circuit) or related codes, along with potential rough running or reduced performance. Replacing a faulty sensor can restore proper timing and engine behavior.
Part price ranges
Prices vary by source and whether the part is aftermarket or OEM. The ranges below reflect common options from major retailers and dealers as of 2024–2026.
- Aftermarket/new knock sensor (non-OEM): typically $25–$60.
- OEM Honda knock sensor from a dealership or HondaParts retailer: typically $60–$120, occasionally higher depending on the part number or engine configuration.
- Used or remanufactured knock sensors: around $20–$50.
Note: Some 2004 CR-Vs may have one knock sensor, while others (depending on engine variant) could use more. Verify the exact fitment for your VIN and engine code before purchasing.
Labor and installation considerations
Labor costs depend on location, shop rates, and whether additional work is required (such as replacing related seals or wiring). Replacing a knock sensor is generally a straightforward job for a qualified technician, but misdiagnosis can occur if the code is triggered by another issue in the intake or ignition system.
- Typical labor time to replace a knock sensor: about 0.5–1.5 hours.
- Average shop labor rate: roughly $75–$125 per hour, depending on region.
- Estimated total labor cost: roughly $40–$190, depending on location and rate.
Always obtain an itemized estimate that separates parts and labor, and consider a pre-purchase inspection if you’re unsure whether the sensor is the root cause.
Where to buy and how to verify fitment
Choose sources that provide clear fitment information for your exact CR-V engine code and year. Here are common routes to consider:
- Authorized Honda dealerships for OEM parts and guidance on correct sensor count for your VIN.
- Auto parts retailers (AutoZone, O'Reilly, NAPA) for aftermarket sensors or OEM equivalents.
- Online retailers (RockAuto, Amazon) for price comparison; always double-check part numbers and compatibility with your VIN and engine code.
Tip: When buying, confirm whether your engine uses one or two knock sensors and match the part number to your vehicle’s engine code (for example, B-series or K-series designations) to avoid ordering the wrong part.
Summary
A knock sensor replacement for a 2004 Honda CR-V typically costs about $60–$120 for the part, with total installed price commonly falling in the $150–$350 range depending on engine configuration and local labor rates. Always verify the exact sensor count and part number for your VIN, compare multiple sources, and consider having a professional confirm the root cause before purchasing and installing a new sensor.