Typical replacement cost for a knock sensor on a Toyota Highlander ranges from about $250 to $800, depending on engine configuration and repair location.
Knock sensors monitor engine knocking and help manage ignition timing. Replacing them usually involves parts cost plus labor, and the total can be higher if the intake manifold or other components must be removed for access. Prices vary by model year, engine type (four-cylinder vs V6), and whether you go to a dealership or an independent shop. This article provides common price ranges to help you plan.
What determines the price
Costs hinge on engine type, whether you need one or two sensors, and labor rate. Access to the sensors can vary—some Highlanders require more disassembly, which increases labor time and cost.
- Single knock sensor (common on four-cylinder Highlanders): Part cost roughly $60–$120; labor about 1–2 hours at typical shop rates.
- Two knock sensors (common on most V6 Highlanders): Part cost roughly $120–$260 total for both sensors; labor around 2–4 hours depending on access.
- Additional costs to consider: diagnostics, potential gasket/seals, and any extra labor if intake manifold/removal is required. dealer labor rates are often higher than independent shops.
In short, sensor count drives the main part of the cost, with differences between OEM and aftermarket parts and whether extra disassembly is needed affecting the final bill.
Estimated total cost ranges
These ranges reflect typical totals you might see at independent shops versus dealerships, for either one or two sensors.
- Independent shop, single sensor: about $180–$350 total (parts $60–$120; labor $120–$230).
- Independent shop, two sensors: about $320–$740 total (parts $120–$260; labor $200–$480).
- Dealership, single sensor: about $250–$450 total (parts $60–$120; labor $190–$330).
- Dealership, two sensors: about $460–$860 total (parts $120–$260; labor $320–$600).
Note: Diagnostic fees, taxes, and regional labor rates can push these figures higher. If the replacement requires extensive access work, expect costs toward the upper end of the ranges.
What to ask your mechanic
Before scheduling the repair, ask about the number of sensors required, whether the quote includes parts and labor, whether diagnostic time is included, and if any additional components (such as gaskets or hoses) may need replacement. Verify whether the price reflects OEM Toyota parts or aftermarket equivalents, and confirm the estimated labor hours for your exact Highlander year and engine type.
Summary
Replacing a knock sensor on a Toyota Highlander typically falls in the hundreds of dollars, with single-sensor jobs generally cheaper than dual-sensor replacements. Parts cost scales with whether one or two sensors are involved, and labor time depends on engine layout and accessibility. Dealerships tend to be more expensive than independent repair shops, and regional labor rates can sway the final total. Always get a written estimate that breaks out parts, labor, and any additional fees, and confirm the sensor count for your specific Highlander model year.