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The average cost for mass air sensor replacement is $452 to $524. Enter your vehicle's information to see how much mass air sensor replacement costs in your local area.
A mass air sensor measures the amount of air entering your car’s fuel-injection system for the ideal air-to-fuel ratio. A faulty sensor can cause your vehicle to run too rich (too much fuel) or run too lean (too much air). If this happens, depending on the imbalance, you might notice symptoms like black smoke coming from the tailpipe, rough idling, hard starting, stalling, jerking or hesitating during acceleration, or worse fuel efficiency than usual. Your check engine light could come on as well if there’s an emissions-related code that adversely affects emissions. Fixing the problem as soon as possible is not only the safe thing to do (you could get stranded), but you could also save your engine from potentially serious – and expensive – damage.
Content has been reviewed by Gary Hardesty, Kelley Blue Book and Autotrader in-house service and maintenance expert and an A.S.E. certified master technician.