Car Smells like rotten eggs when braking?

Hi,

Interestingly, a rotten egg smell is usually from the exhaust/catalytic converter. If you get out after this happens, can you tell if the smell is stronger at any of the wheels? If you leave the engine running, is the smell stronger near the exhaust?

Let me know that. Also, check around the wheels and exhaust under the vehicle to make sure nothing is stuck to a component such as a dead animal or plastic bag stuck to the exhaust.

Let me know.

Joe

Hi,

It could be that something got into the HVAC causing the odor, but on this new of vehicle, I would think the cabin air filter would still be good. Also, does it only happen when you use the brakes? If you allow the vehicle to be parked and idling, do you smell it?

Yes, a battery can cause it as well. It's interesting that the battery was drained on this new of vehicle.

If you want, here is a link that explains in general how to replace a cabin air filter. It wouldn't hurt to inspect it.

Also, once you stop the vehicle, do you still smell it, or does it go away? I still have a feeling it is related to the exhaust. Were they able to smell it when it was at the dealer? I ask because it is still 100% under warranty and if there is a noted problem, they are responsible for repairs.

Let me know.

Joe

Hi,

This could indicate the battery is being over or under charged. Also, if there is a constant heavy load on the battery, that can cause the odor as well.

Do me a favor. Let's confirm the alternator is working properly. If you take a look at this link, it explains how to test the alternator. All you will need is a simple voltmeter or multimeter.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Let me know the results.

Take care,

Joe