20 Most Recent 2003 Volkswagen Jetta TDI - Page 9 Questions & Answers

you need to git vin # from car to get the radio code, i ended up putting a aftermarket radio in instead, alot less headache, also they sell a wire harness to adapt to it,easy as plug n go, real simple

O2 sensor as in lambda sensor in the exhaust you can only get 4 or 5 pin and I would imagine it been a 4 pin as its pre cat . I would buy a OE one

If the problem was in the alternator, the battery would have been discharged and you would not have been able to restart the car (unless jumped, but not have run for more than a few minutes before shutting down again) So, my answer: No.

door switch is not working.

your O2 would be the next thing to check

Either you threw a belt or the alternator went bad. Your symptoms sound like alternator...you were running on the battery till you ran out of power.

There is no dipstick or way for the owner to check tranny fluid. It has to be brought to dealer and left overnight. They have to plug it in under a specific set of conditions to check fluid. Expect to pay about 40 dollars a liter for tranny fluid. I just had this done about 2 weeks ago

don't know about the MPG it could be a lot of things. I have a 2001 Jetta TDI. You should NEVER change the oil at 3K miles. VW recommends 10K miles for a reason. The Synthetic oil has additives to remove varnish and it does that but it needs some time to replace the varnish and properly protect sensitive engine parts. 3K is oil changes are not a good thing for a TDI......Just use the right oil and change at 10K

Does the lock/unlock work by pressing the button on the inside? If it is just the drivers side door, It may be the motor for the lock on that side.

sounds like the turbo could be going bad, did you check air filter? Black smoke generally means your not getting enough air to burn fuel.

Keep check on your temp. gage, and check your sensors.