The 3M Headlight Lens Restoration Kit is our top choice for restoring cloudy headlights. Compare the steps and supplies in each kit, especially the finishing protection, to find one that matches the ...

Of all the things you could deal with while driving, engine sputtering is one that can cause a lot of alarm. Once it starts, it’s difficult to know whether or not the car will make it to its next ...

A bad ABS sensor can turn on the ABS warning light and may also trigger traction control or stability control warnings. A sensor or related wheel-speed signal problem can sometimes cause the ABS to ...

A thermostat controls the coolant flow entering and leaving the engine, and the coolant temperature sensor records the coolant temperature by displaying it on the dashboard. With a malfunctioning ...

Engine sensors measure conditions such as airflow, temperature, pressure, and shaft position so the control unit can manage the engine. Which sensors a car has depends on its design. There is no ...

A temperature gauge that moves up and down can indicate low coolant, air in the system, a sticking thermostat, or a sensor or wiring fault. If it reaches hot or red, or an overheating warning appears, ...

A flashing ESP light often means stability control is responding to wheel slip; a steady light may mean the system is switched off or has detected a fault. Check your owner’s manual. If it stays on, ...

The most common symptoms of a bad or broken coil spring include one side of the vehicle sitting lower than the other and a noticeably bouncier ride. You might also hear rattling or clunking noises, ...

Use the VIN decoder above to look up a vehicle by its 17-character Vehicle Identification Number. It can return manufacturer-reported details such as the make, model year, body style, and engine ...

A sidewall bulge, puncture, deep cut, or exposed cords means the tire should be taken out of service. Standard puncture repairs for passenger tires are limited to the tread area, so don’t glue or ...

When I diagnose a misfire, I first want to know when it happens: at idle, under acceleration, or only when the engine is cold. That pattern, along with the codes, helps narrow down what to check ...

Limp mode is a reduced-power strategy that can limit engine power, RPM, or shifting after a control module detects a fault. Get to a safe place if the car is overheating, has an oil-pressure warning, ...