Mass air flow sensors fail most often in cars but a $20 air filter replacement every 12,000 miles prevents the $250-400 repair bills most drivers face.

It you have the tools you can fix the HEMI tick at home for under $400. But it's easy to make the problem much worse.

A Cummins bypass cable sidesteps the protections on 2018-and-newer Cummins vehicles, letting you adjust settings that would ...