Standard/OEIn stock
$40.13
2 items in stock
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SEN-2VSS0008• Vehicle Speed Sensor
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GeoBrakes stocks OEM-grade vehicle speed sensors confirmed to fit the Mercury Grand Marquis, the components that supply vehicle speed data to the Grand Marquis transmission control module, ABS system, speedometer, and cruise control simultaneously. Every Mercury Grand Marquis sensor is direct-fit, calibrated to the correct signal frequency
Standard/OE$40.13
2 items in stock
Select your vehicle to see compatible products and accurate pricing
The vehicle speed sensor on the Mercury Grand Marquis is a single component whose data feeds multiple vehicle systems at once on your Grand Marquis. When it fails on the Mercury Grand Marquis, the effects appear across your Grand Marquis speedometer, transmission, cruise control, and ABS simultaneously, making diagnosis less straightforward than a fault that affects only one system on the Mercury Grand Marquis.
On older Mercury Grand Marquis vehicles and most rear-wheel-drive designs, a dedicated transmission-mounted speed sensor monitors output shaft speed on the Grand Marquis and serves as the primary reference for the Grand Marquis speedometer and transmission control module. On modern Mercury Grand Marquis front-wheel-drive and all-wheel-drive platforms, wheel hub sensors serve the dual function of ABS speed sensing and vehicle speed data delivery on the Grand Marquis, one sensor feeding multiple Mercury Grand Marquis systems from a single mounting point.
Signal accuracy is the defining specification for a Mercury Grand Marquis vehicle speed sensor. A sensor that generates the wrong pulse frequency for your Grand Marquis control modules produces incorrect speedometer readings, mis-timed transmission shifts, and inaccurate ABS calibration on your Mercury Grand Marquis, even if it passes a basic resistance test. Every speed sensor in the GeoBrakes catalogue is sourced to the correct signal frequency for the Mercury Grand Marquis exact year, make, model, and sensor position.
Can a faulty speed sensor affect the transmission on my Mercury Grand Marquis?
Yes. The Mercury Grand Marquis transmission control module relies on vehicle speed data to calculate correct shift timing. A failed Grand Marquis speed sensor can cause erratic shifting, delayed upshifts, incorrect downshifts, or trigger Grand Marquis limp mode.
Will a bad vehicle speed sensor turn on the check engine light on my Mercury Grand Marquis?
Yes. A failed Mercury Grand Marquis vehicle speed sensor typically stores fault codes P0500, P0501, or P0502. Depending on the Grand Marquis, it may also trigger ABS, traction control, or transmission warning lights simultaneously.
Is the vehicle speed sensor the same as the ABS wheel speed sensor on my Mercury Grand Marquis?
On many modern Mercury Grand Marquis vehicles, yes, wheel hub sensors serve both the ABS system and vehicle speed sensing simultaneously on your Grand Marquis. On older Grand Marquis vehicles with transmission-mounted speed sensors, they are separate components. Use the GeoBrakes vehicle selector to confirm the correct sensor type for your Mercury Grand Marquis.