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Exhaust And Emissions

2020 BMW X5 M and X6 M: SUVs With Scoot

By Brian Wong on October 3, 2019

Competes with: Mercedes-AMG GLE63, Porsche Cayenne Turbo, Jaguar F-Pace SVR Looks like: A slightly aggro X5 or X6 Drivetrain: 600-horsepower, twin-turbocharged 4.4-liter V-8 with 553 pounds-feet of... Read More
What Does This Button Do?

By Joe Bruzek on July 17, 2018

The 2012 Porsche 911 didn’t make our list of the Top 10 Cars for the 2012 Apocalypse, but one button may lead you to believe that the car is armed and ready for battle. Like an old pirate ship, the... Read More
Should the Exhaust System Last the Life of a Vehicle?

By Rick Popely on February 23, 2018

CARS.COM — A few decades ago, most car owners could count on having to replace at least part of their exhaust system every five years or sooner. Muffler shops seemed to be doing brisk business on e... Read More
When Should the Oxygen Sensor Be Replaced?

By Rick Popely on February 20, 2018

CARS.COM — Modern car engine control systems rely on input from several sensors to regulate the engine’s performance as well as its emissions and other vital functions. When these sensors fai... Read More
Why Is My Muffler Rattling?

By Rick Popely on February 20, 2018

CARS.COM — Most exhaust problems can be diagnosed by paying attention to unfamiliar sounds or taking a look underneath the car. One of the most common exhaust problems is a rattling sound. When you... Read More
What Are Common Catalytic Converter Problems?

By Rick Popely on February 19, 2018

Catalytic converters are located in the exhaust system between the engine and the muffler, and they are one of the last lines of defense against air pollution from vehicles. They use ceramic-coded ... Read More
What's Causing That Smell in My Car?

By Rick Popely on February 14, 2018

CARS.COM — If your vehicle is giving off an unusual or sickening odor instead of that instantly identifiable new-car smell, follow your nose and find the source of the aroma. Bad smells can lead to... Read More
How to Tell if a Car Has an Exhaust Leak

By Rick Popely on February 13, 2018

CARS.COM — How can you tell if your car has an exhaust leak? Your ears and nose can alert you to some exhaust leaks, but they may not be able to detect all leaks, including ones that could allow ca... Read More
What's Included in a Tuneup?

By Rick Popely on February 1, 2018

CARS.COM — A car tuneup is an outdated service consisting of replacing parts to bring the ignition and fuel systems up to spec for maximum engine performance and efficiency. A traditional tuneup ha... Read More
When Should You Replace the PCV Valve?

By Rick Popely on January 31, 2018

CARS.COM — The positive crankcase ventilation, or PCV, system was one of the earliest emission-control devices used in vehicles. The PCV system draws leftover combustion gases from the crankcase (t... Read More