I have a 2003 cts that I've been smelling a burning smell mostly at right front & it smells like a burning belt . Belt is fine so then thought it might have something to do with heater/heater core etc as it seems to smell worse when running heat but ran car without any heat ( all controls off ) and can still smell it but not as noticeable . Have checked oil etc and all fluids are at level . Except antifreeze was below max line was only fluid issue . Thought maybe it could have something to do with car being in sports mode as well , which I've been running car with sports mode off the last couple of days so will try running with it on and see if smell increases . Man give me the 70/80's back ! Any ideas on this burning rubber smell as I've just about diagnosed every little thing I can . Drive'n me nuts !

SOURCE: Burning rubber smell inside car-2003 CTS Cadillac

Diagnosing this will be subject to a process of elimination. It could be the radio, blower motor or any other accessory particularly ones with moving parts; Try switching those off and try to note when this problem occurs and what is on/whatyou are doing. Something is getting hot causing the smell so it will be a situation where the accessory will have to run a while before doing it. It is a possibility that there is an electical curcuit overheating, but less likely. Lets rule out accessories first and give us an update. GL

SOURCE: 2003 Saturn, DOHC V6, burning smell in interior after car warms.

if the smell only comes on when the heater is on try pulling the blower motor mice like to build nests in the blower motor housing.

SOURCE: coolant smell inside cab when you turn on car/heat

Likely you are in the beginning stage of a heater core leak. at this point, you may be able to temporarily solve the problem by using a good system sealer (I'm partial to the kind that comes as a silver powder) Since we don't actually know the condition of the core, temporary may mean a week or several years, but replacement is expensive and time consuming so I'd definitely give it a try.

SOURCE: 2003 ford taurus smell antifreeze burning &

probably not. put aluminum seal in the cooling system and top off antifreeze. you may need a hose or fitting from where you are decribing the leak. if the leak stops with the sealant you are good to go. otherwise take it to a shop and they will tell you. do not tell them you think it is a head gasket.

SOURCE: Rubber smell and slight smoke

a rubber smell?? the best thing you can do is diagnose it properly by blocking it up high enough of the ground and let it smoke then slide yourself under there and see where it originates ... check for witness drip marks on the exhaust first??