Smells like rubber burning?

hello, all.

i have '01 audi a6 2.7t. i noticed not too long ago that after some driving, i could smell rubber burning-kind of smell, especially from the front passenger side. it’s not like it’s making any noise. has anybody got any idea what this could be?

Thanks~

Your AC compressor could have seized up and your serpentine belt may be burning. Or a vacuum line could have fallen off onto your exhaust manifold. Or, a brake caliper could be sticky and the heat’s cooking the outer liner on the brakeline…and maybe the fluid too.

Pop the hood and take a peek.

Idea #1: Oil leaking and burning on the hot exhaust. Idea #2: possibly something in the air ducts to the passenger side. For idea #1, open the hood and take a whiff. Idea #2, after the engine compartment, sniff the passenger area, again … especially, near the air duct outlets.