Q: I am smelling what seems to be exhaust and or radiator coolant inside of my car.

asked by on December 23, 2016

I have a check engine light on inside of my 2007 audi s6. Took it to auto zone and the cause is a faulty vacuum hose near the air intake system. Is the root cause of smell or could it be cabin air filter related?

My car has 120000 miles.
My car has an automatic transmission.

Smell in the car Inspection $79.99 - $89.99 Get a Quote
Coolant is leaking Inspection $79.99 - $89.99 Get a Quote

If you think you’re smelling coolant inside your Audi, then you probably are. I can’t say that coolant smells like exhaust, but I guess that is subjective. Audi has always had problems with leaky heater cores, so when your car gets some years and some miles on it, it’s not unlikely that you’ll detect a coolant smell in the car. You might also notice a kind of a greasy film on the windshield when the defroster is on. The vacuum leak that you found at Auto Zone could account for codes and a check engine light, but would not lead to smells inside the car. You should get tested for a coolant leak. If you contact Your Mechanic, they can send a technician to your home or office to check out your bad smells and pressure test your cooling system if that seems appropriate. Then they can tell you what it’s going to take to solve your problem.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Recently had rack and pinion replaced by backyard mechanic, now having problems shifting out of park? Coincidence or no?

Hi there. Unfortunately, if these concerns weren't there before the repair then they are most likely the result of the repair. Although her intentions were well, there are many mechanics such as this that have similar results. Replacing the steering...

Car won't crank even when jump started

If not even the lights work, there is probably a major fuse or fuses (or fusible links) that have blown and/or a major wiring fault. If you want the required diagnostic steps performed by a certified Mechanic, dispatched by YourMechanic...

Funny rotten egg smell inside the car.

This may be related to the inside cabin filter. As you may know, your car has a cabin filter that works much like the engine air filter for your car does. As the air vents circulate air in from the...

P1717 check engine light code on Acura TL type s 07

Hi there. This OBD-II code pertains to the transmission selector range switch. This switch tells the transmission what gear you are selecting. This code can be induced if the battery voltage got below 11 volts. The solution is to either...

My car drives straight when I let go of the wheel, but my steering wheel is slightly crooked

If the vehicle alignment (camber, caster and toe settings) is in fact correct (within manufacturer specification), the steering wheel can be centered by adjusting the tie rod ends on each side of the vehicle. If the steering wheel is off...

bmw 335i rear main seal

The part required is the seal. A variety of special tools are required to perform the replacement including an engine support bar (and accessories), a transmission jack, a calibrated torque wrench, a flywheel holding tool, a seal removal tool and...

Whining noise 40 mph on 2007 Audi A3 Quattro

Hello. Most of the time, this is caused by a failure in the transmission. It may be as simple as a low or contaminated fluid. I usually check the fluid and change it if it is bad. If the fluid...

Air conditioning stopped working

On some of these vehicles, it may be a simple cycling switch that has failed, or a more serious problem like a failed compressor. The only way to know is to have a thorough inspection of the AC system by...

My car is shaking from the passenger side when idle in D mode and the ac turns on

A more likely explanation is the engine is not "quickly" responding to the increased load placed on it when the a/c turns on, although apparently the idle does smooth out after a short delay. If the motor mounts were a...

Related articles

Audi Certified Pre-Owned (CPO) Car Program
If If you’re looking for a used Audi vehicle, you may want to check out their certified pre-owned program. Many manufacturers have a certified pre-owned (CPO) program, and each one is set up differently. Read on to learn about the...
A Buyer’s Guide to the 2012 Audi A7
In In true Audi fashion, the 2012 A7 delivers the exceptional performance, enjoyable handling and luxurious interior you’ve come to expect. However, they also combined those things with an innovative four-door coupe hatchback design that is anything but ordinary. ...
A Buyer’s Guide to the 2012 Audi A5
For For drivers who want a comfortable ride, expert handling and luxurious amenities, the 2012 Audi A5 will certainly fit the bill. Designed for performance and to deliver a gorgeous look, this model offers an array of options and features...