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Relay

A relay is an electrically activated switch used to complete a circuit. It can be a mechanical relay that generates a small magnetic field to close the contact points. It can also be a made of a power

Release bearing in a hydraulic clutch is sticking

Resonator Muffler

A resonator muffler, or simply resonator, is a device that further dampens the sound of the engine through the tailpipe.

Restricted catalytic converter

A restricted catalytic converter can slow or stop the flow of exhaust gases. This will increase the pressure in the exhaust manifold and can lead to a reduction in engine power.

Restriction in cabin air filter

A restricted cabin air filter can slow or stop the flow of air entering the passenger compartment through the vents. Particles of dust and dirt can build over time and reduce the flow of air through t

Retread Tire

Retread tires, also called retreads, are used tires that have had the original tread removed and added new rubber to form a new tread.

RideFix.com

RideFix.com is an online resource for your car with tools to diagnose car problems, find repair shops, track your service history, ask car questions, and learn how your car works.

Rim leak

The tires sit on the wheel rims. If there is a gap between the rim and tire, the air will leak out and leave the tire flat.

Rocker Arm

A rocker arm is a curved lever that pivots in the center. It is attached to a push rod at one end, and a valve at the other. As the camshaft rotates, the push rod rises and pivots the rocker arm, op

Rocks or debris in wheels or brakes

During normal driving, dirt, stones, or rocks can become lodged in the brakes or wheels. This can cause noise during braking, driving, or turning. For example, pieces of dust or dirt may get onto the