2017 Chevrolet Malibu: exhaust fumes leaking into the cab

Maintenance/Repairs
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2017 Malibu: We are experiencing exhaust fumes getting into the cab of the car. Even when the vent adjustment is on interior circulation only. The fumes are more intense when stopped at a stop light and a car is in front of us. We took the car to our Dealer and they find nothing wrong. Can anyone help with a suggestion?

2

Stay a least two car lenght away from the car in front of you if possible. You could try a similar car and see if you smell exhaust fumes in the cabin.Could be a bad window or door seal…anything is possible.

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If it’s actually a 2017, you should still be under warranty. I would take it to your dealership for diagnostics and repair. And I wouldn’t wait around on this repair, exhaust gasses contain carbon monoxide, which is a silent killer

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Click around to find a battery operated CO monitor. Engine exhaust has a lot of CO in it so if you do have exhaust in the cabin this should start chirping like mad in about 15 minutes. Home CO monitors have a designed time delay in them. You may also be picking up oil that was spilled in the exhaust manifold,a little makes a big stink.

https://www.homedepot.com/p/First-Alert-Battery-Powered-Carbon-Monoxide-Detector-Alarm-with-Digital-Display-1039727/307674704?cm_mmc=Shopping|G|VF|D27E|27-5_SAFETY-SECURITY|NA|PLA|FireSafety|71700000033099034|58700003867178934|92700031086147779&gclid=EAIaIQobChMIqrXxxfO93wIVRIGzCh3WEADnEAQYASABEgKNY_D_BwE&gclsrc=aw.ds

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If that dealership cannot find anything, go to any other dealership.
Your warranty is good at any Chevy dealership.

Yosemite

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Are the fumes only from other cars or do you get them when there are no other cars nearby?

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My guy figured out the problem… the oil cap under the hood is not the proper size… I don’t know if it came from the factory this way or not… the oil cap is supposed to say dextros… I called a Chevy dealership ordered the part for 11.00 and I have not smelled the fumes in about two weeks now

2 Likes
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My guy figured out the problem… the oil cap under the hood is not the proper size… I don’t know if it came from the factory this way or not… the oil cap is supposed to say dextros… I called a Chevy dealership ordered the part for 11.00 and I have not smelled the fumes in about two weeks now… you guys should try it

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That’s awesome you found a cheap solution to the issue!

1 Like
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Definitely… and I still haven’t smelled the fumes… I recommend everyone try that before going out spending an arm and a leg

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odd that a 3 yr old car would have a replacement oil fill cap. i think the malibu has a turbo motor? you would think the emissions system would detect a poor sealing VC due to a leaky fill cap? maybe not