Sensors

This collection covers 609 sensors across 16 part types - from the high-volume vehicle speed sensor (VSS) that feeds your speedometer, ABS, and transmission shift logic, to steering angle sensors, headlight leveling sensors, cruise control distance sensors, and a range of specialty units including occupant detection, stability control pressure, and convertible top position sensors. Most sensors don't have a fixed replacement interval; they fail from heat cycling, connector corrosion, debris impact, or internal drift over time. VSS and transmission range sensors typically surface issues between 80,000–150,000 miles, while steering angle sensors often need recalibration or replacement after suspension work or a collision. When buying, prioritize OEM-spec signal output and connector compatibility - a sensor with the right shape but wrong output range will set fault codes even if it physically fits. For ADAS-linked sensors like cruise control distance and stability control pressure units, OEM or OEM-equivalent parts are strongly recommended over generic aftermarket.

Signs you need replacement

• Speedometer reads erratically or drops to zero at speed. A failing vehicle speed sensor sends an intermittent or absent signal, causing the gauge to fluctuate, stick, or go dead - often accompanied by a VSS-related code like C0035 or C0040.
• Transmission shifts harshly, hunts between gears, or defaults to limp mode. VSS and transaxle input/output speed sensors provide shift timing data; when their signal degrades, the TCM loses reference points and may lock the transmission in a fixed gear to protect the drivetrain.
• Traction control or stability control warning light stays on. A faulty steering angle sensor or stability control pressure sensor disrupts the yaw and slip calculations that ESC depends on - the system disables itself rather than act on bad data.
• Headlights aim too high or too low and won't adjust correctly. Headlight level and automatic headlight sensors feed the adaptive leveling system; a dead or drifted sensor leaves the beam fixed at the last known position or throws a leveling fault in the BCM.
• Adaptive cruise control or collision warning system deactivates or behaves erratically. Cruise control distance sensors (radar or ultrasonic) can fail from physical damage, contamination behind the bumper fascia, or internal component failure - the system will typically alert you with a driver assistance unavailable message.
• ABS activates at low speeds or during normal stops. A speed sensor producing signal noise or dropout can cause the ABS module to falsely detect wheel lockup, triggering the system at speeds where it shouldn't engage.

Frequently asked questions

• Do I need to reprogram or calibrate a sensor after replacing it? It depends on the type. Vehicle speed sensors and most transaxle sensors are plug-and-play. Steering angle sensors almost always require a zero-point calibration with a scan tool after installation - skipping this will leave ESC and lane-keeping systems operating on a false reference. Headlight leveling sensors may also require a reset procedure through the BCM.
• Is OEM worth the premium over aftermarket for these sensors? For safety-system sensors - steering angle, stability control pressure, occupant detection, and cruise control distance - OEM or a Tier 1 equivalent (Bosch, Delphi, Standard Motor Products) is the better call. Signal accuracy matters more than price here. For vehicle speed sensors on high-mileage daily drivers, quality aftermarket units perform reliably and typically cost 40–60% less than dealer parts.
• What's the typical cost to replace a vehicle speed sensor, and is it DIY-friendly? Parts typically run $20–$80 for aftermarket, $60–$150 for OEM, depending on make and model. Most VSS replacements are straightforward - one mounting bolt and a wiring connector, accessible from under the vehicle without lifting the cab. Budget 30–60 minutes. Transaxle input/output sensors on front-wheel-drive platforms can be tighter and may require axle removal on some applications.