A knock sensor replacement costs $209 to $1,057 in 2026
A knock sensor replacement costs $209 to $1,057 in 2026 for common cars, per RepairPal. Its national average is $410 to $578. Labor is about $286 to $420 and parts are about $124 to $157. J.D. Power says the cost can range from $200 to $800, and more for luxury cars or hard to reach sensors. Mechanic Base says the average knock sensor replacement is $250 to $350, with parts at $20 to $100 and labor at $150 to $250.
Knock sensor replacement cost by car
RepairPal lists these ranges for the most common cars. Your year and engine move the price inside each range.
| Car | Price, parts and labor |
|---|---|
| Ford F-150 | $758 to $1,057 |
| Nissan Altima | $466 to $706 |
| Toyota Camry | $411 to $615 |
| Toyota Corolla | $334 to $518 |
| Honda Civic | $277 to $396 |
| Honda CR-V | $244 to $372 |
| Honda Accord | $233 to $365 |
| Chevrolet Silverado 1500 | $209 to $294 |
How common cars compare
Against the middle of the RepairPal national average, $494, the Ford F-150 runs about 84 percent more; the Nissan Altima runs about 19 percent more; the Toyota Camry runs about 4 percent more; the Toyota Corolla runs about 14 percent less; the Honda Civic runs about 32 percent less; the Honda CR-V runs about 38 percent less; the Honda Accord runs about 39 percent less; the Chevrolet Silverado 1500 runs about 49 percent less. The gap comes from where the part sits, how long it takes to reach, and the price of the part for that car.
What price guides say
We checked 3 price guides. They do not all measure the same thing, so read each line for what it counts.
| Source | What it found |
|---|---|
| RepairPal | National average $410 to $578. Labor is about $286 to $420 and parts are about $124 to $157. |
| J.D. Power | J.D. Power says the cost can range from $200 to $800, and more for luxury cars or hard to reach sensors. |
| Mechanic Base | Mechanic Base says the average knock sensor replacement is $250 to $350, with parts at $20 to $100 and labor at $150 to $250. |
What pushes the quote up
| What | Why it matters |
|---|---|
| Sensor location | On many V6 and V8 engines the sensors sit under the intake manifold. The shop must take the manifold off, and that adds hours of labor. |
| Number of sensors | Some engines have one sensor. Others have two or more. Each extra sensor adds parts cost. |
| Part type | A factory part costs more than an aftermarket one. Some cars need the factory part to work right. |
| Related parts | Old wiring, gaskets, and coolant may need work while the engine is open. This raises the bill. |
| Car type | Luxury and turbo engines pack parts tightly. Labor runs longer on these cars. |
How to tell you need it
- The check engine light comes on with a knock sensor code.
- The engine pings or hesitates under load, and power feels weak.
- A shop reads the codes, checks the wiring, and tests the sensor signal before it replaces the part.
What the price includes
The price usually covers the new sensor, labor to reach it, and clearing the codes. Ask if gaskets and a test drive are included. It does not include tax, shop supply fees, or other repairs the shop finds while the car is in.
How to judge your quote
- Did you test the sensor and wiring, or only read a code?
- Is the sensor under the intake manifold, and how many labor hours is that?
- Is the part factory or aftermarket, and what is the warranty?
- Will you replace gaskets or seals while the manifold is off, and what do they cost?
- Compare the total with the range above: $209 to $1,057 for most cars.
Ways to pay less
- Ask the shop to check the wiring first. A bad wire can mimic a bad sensor.
- Get two or three quotes. Labor hours differ a lot from shop to shop.
- Ask for a good aftermarket sensor if your car allows it.
- If the manifold is already coming off for other work, do both jobs together to save labor.
Dealer or independent shop
RepairPal puts labor for a knock sensor replacement at $286 to $420. At the typical independent shop rate of about $140 an hour, that is about 2.5 hours of work. A dealer charging $200 an hour would bill about $504 for the same labor, and a $100 an hour shop about $252. Parts cost about the same anywhere, so the shop rate is where you can save. See what mechanics charge an hour.
Why this costs more in 2026
Shop labor now runs about $100 to $250 an hour. Many car parts are imported, and freight costs went up after the oil shock that began with the Iran war in February 2026. Steel, copper, aluminum and resin prices are up too, and they go into almost every part. Knock sensors use a small piezo crystal and sealed wiring, and those parts cost more now. The labor to reach them under the manifold has also gone up.
How we got these numbers
The national range, the labor and parts split and the prices by car come from RepairPal's knock sensor replacement estimate, last updated July 25, 2026. We checked them against J.D. Power and Mechanic Base, and read every number on the source page on October 7, 2026. These are planning ranges, not quotes. Your shop's written estimate is the real price.
Common questions
How much does a knock sensor replacement cost?
RepairPal lists $410 to $578 nationally. J.D. Power says $200 to $800.
Can I drive with a bad knock sensor?
You can for a short time, but the engine may run with less power and worse fuel use. Real engine knock can cause damage, so get it checked soon.
How long does it take?
It can take 1 to 2 hours if the sensor is easy to reach. It can take 3 hours or more if it sits under the intake manifold.
Can I replace a knock sensor myself?
On some engines, yes. On many V6 and V8 engines the sensor is under the manifold, so a shop is the safer choice.