Maintenance
All articles

Using regular gas in an engine that requires premium could void your warranty if it causes severe engine knock or pinging.
By Rick Cotta
August 10, 2025

EGR stands for exhaust gas recirculation, and the EGR valve is part of a system that recirculates exhaust gas back into the engine’s intake manifold for a return trip to the cylinders it just left.
By Rick Cotta
July 27, 2025

Airbags cannot do their job if the sensors are not working properly, so if the SRS light on the dash illuminates, don’t ignore it.
By Cars.com Editors
July 18, 2025

A misfire means that a cylinder in your engine isn’t producing the power it should because the air-fuel mixture in it didn’t properly ignite and burn.
By Rick Cotta
July 13, 2025

Everyone knows cars cost money, but what’s less known is how much that car will keep costing you after its initial purchase.
By Robert Duffer
July 8, 2025

While not an immediate threat, sap can etch through the paint's clear coat after some time, leading to discoloring and staining.
By Robby DeGraff
July 7, 2025

A catalytic converter is part of your car’s exhaust system that converts harmful engine-exhaust pollutants into something less harmful to the environment.
By Nick Kurczewski
June 24, 2025

When suspension bushings are worn, they don’t adequately fill the gap between parts, which can lead to loose-feeling steering, uneven tire wear and even broken components.
By Rick Cotta
June 22, 2025

Rebuilt cars often come with cut-rate prices that reflect that status, so it may be tempting to buy one — but should you?
By Cars.com Editors
June 11, 2025

A general recommendation is to replace the positive crankcase ventilation, or PCV, valve every 30,000 to 50,000 miles.
By Rick Cotta
June 8, 2025