I cant locate the cabin air filter on my 2008 VW Beetle. I went to the location and its not there. There is a musty smell coming from the vents.

If you are certain there is no filter, you will likely still have to get inside the blower housing. The next likely culprit would be the coil- it could be dirty and moldy. This may not be easy to access or see.
Also, make sure the drain hose isn't clogged- you should be getting water dripping under your car when the a/c is on, as it is removing the moisture in the air inside the vehicle.

Either a coolant leak or water getting into the cabin.

Pull the carpet back & make sure they are not soaked,
before you diagnose thing further

Sun roofs leak onto the carpet also

1994 Mercury Capri ac does not have a cabin air filter. Weak air flow and bad smell could be debris in the fresh air/ac inputs. Check under the hood for debris where the air enters, the area under the wiper, and behind the vents inside, they get clogged if you park under a shedding tree...Chris

under hood drivers side in black plastic box.product code is at walmart where you buy fillter

I think you may need to chnge your cabin air filter if it smells like mildew or a musty type smell, its located under the hood by the windshield on those I believe.

It sounds to me if you are having a "musty smell" then you might have a problem with your condensation drain line for you a/c system or a small leak on your heater core. If it is plugged then water will collect in the vent system causing a musty smell from the water not draining and if there is a small leak on the heater core then coolant can collect in the vent system. I would run the a/c on a warm day and look for water draining from the vehicle around where the dash is located to check the drain line. As far as your air cabin filter most are located behind the glove box. You usually need to remove the glove box to get to the filter.

The drain should go through on the passenger side under the dash....you might need to replace your cabin air filter.

If you run your Air cond on recirculate always try using an air sanitizer in your return vent. Or switch your A/C to outside air flow for for half an hour and raise the rear of your sunroof panel to vent the stale air do this till the smell dissipates and then close he sunroof and reset the A/C to recirculate if desired.

There should be a cabin filter. Call the parts store to see if they stock one for your car in particular.

Cabin filters are located in stream of the outside air flowing in. I know on a '99 Galant, you just had to take out the glove box, loosen two screws, and out she slid.

It'll be right near the blower motor, above the passenger's foot rest, behind the glove box. Simple hand tools will do it.

Be careful when pulling it out, as it may have leaves and acorns or fur all over it. Simply slide in the new filter and you're done.

You'll be surprised at how much better it'll smell, and how much harder your A/C and heat will blow without the constriction of a dirty filter.

Most cars have the cabin filters behind the glove box, but if not there, then they'll have them under the hood, on the firewall, on the passenger side. Usually inside a small black plastic box.

If your car DOESN"T have a cabin filter, then the musty smell is stuff that is sitting in the heat/ AC system. You can try spraying pine sol or Febreeze down the air intake hole for the system. Mind you, this is not the same as the air intake for your cars engine!

The air intake for the cabin filter will be on the passenger side, under the hood, most likely under a plastic cowling of sorts.

Good luck!

First thing I would do is rig a vacuum cleaner hose that will go deep into the defrost vents... cut the defrost on HIGH - WIDE OPEN - FAN ON HIGH!! -- then stick the hose down and dig around.. you will find you have collected a LOT of farm "dust" (down)(the way dust falls) in the defrost vents.. and the A/C vents are not (down) and nothing falls (down into) the vents...