The Signs of a Car Exhaust Leak

A car exhaust leak is dangerous. Aside from operational issues, it also creates a major safety hazard by releasing toxic and odorless fumes into the cabin. Do not hesitate to bring your vehicle to an auto service if you suspect a leak.

3 Signs of a Car Exhaust Leak

Lower MPG

A leak causes engine pressure fluctuation. This affects the oxygen sensor and in turn may decrease the total MPG by two to three miles.

Louder Engine Noise

Does the vehicle sound louder than usual when you accelerate? The increased engine roar may sound nice, but it’s having a negative effect. This is likely an indication of a leak near the exhaust manifold.


Do you feel a vibration in the steering wheel or pedal? A leak causes the escaped gas to enter into the steering mechanism, causing a light but noticeable vibration.

Consequences of a Leaky Exhaust

Noxious fumes like nitrogen oxide and carbon monoxide can enter the cabin causing dizziness, headaches, nausea, and fatigue. In extreme cases, the poisoning can lead to death. This was tragically the case in 2014 when two Pennsylvanian teens died after an undetected exhaust leak caused carbon monoxide to enter the enclosed cabin.

In addition to the dangers, a leak can also be harmful for the car by causing engine backfiring. Escaped fumes that mix with the air creates backpressure, resulting in a backfire that reduces engine performance and hurts fuel economy.

We Diagnose and Repair Damaged Exhaust Systems

A leaky exhaust has life-threatening implications. Please don’t ignore the symptoms. Rather, bring your vehicle to an auto repair service ASAP. Premier Automotive Services provides repair financing options, so you receive the necessary repairs without breaking the bank. A car exhaust leak is not a DIY matter; it requires immediate professional attention.

Edited by Justin Vorhees

Exhaust Leak Repair and Diagnosis

Serving Customers in Kent, Seatac, Des Moines and Federal Way


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