Counterfeit spark plugs are everywhere online, and they can ruin your engine fast. Here's how to check yours, avoid sketchy ...

During cold weather, your vehicle may require twice the amount of current than normal to get the engine to start.

Your car’s O2 sensor can be cleaned if you’re in a pinch, but cleaning won’t make an old sensor reliable again. Most failing sensors must be replaced.

Salvage yards often document the mileage of major parts, and a mechanic should inspect a used transmission before ...

You can measure horsepower at home by timing RPM climbs, calculating wheel speed from tire size and gear ratios, and comparing the results to SAE net specs.

Learn how to make your car battery last longer with this expert advice from CR. These simple steps will catch any battery ...

Excessive idling leads to incomplete fuel combustion, carbon buildup in valves and spark plugs, and higher fuel consumption, ...

Discover how Mazda’s 13B-MSP Renesis evolved, its tech breakthroughs, and the issues that defined it, plus how it connects to ...

Your car’s performance depends on precise control of air, fuel, and spark, and vacuum leaks quietly disrupt that balance.

During my recent visit to the Chrysler dealer, they suggested that I replace all six of the spark plugs. The car has only 23,000 miles on it.

Owners of 2016-2022 Tacomas are hitting 60,000 miles and facing a new shock: dealer service quotes up to $3,400. From $800 ...

Cold weather exposes weak batteries fast. Here’s how to spot the warning signs—and replace it before winter leaves you stuck.