TDC for 2002 Jetta TDI

SOURCE: 2003 vw jetta tdi fuel filter

It is on the passenger side right behind the washer fluid fill tube. You can follow the fuel lines (look like 1/4" black tubes, some are clear) from the injector pump to it. It is a caniser a bit bigger than a normal looking oil filter and sits between the washer bottle and the metal that forms the wheel well. It is held in by a screw type clamp about half way down the cylinder. Probably isn't the fuel filter unless there is air in the lines to the injector pump or they didn't bother to fill the fuel filter up with diesel after putting it in. There is not a fuel pump in the tank in these cars so everything is sucked up by the injector pump and it needs to be primed properly.

SOURCE: vw jetta 2003

Take your car to autozone or another parts store that will be willing to pull the OBD II diagnostic codes for free or buy an inexpensive $40-50 OBD II diagnostic reader.  

I have a 05 Jetta TDI 100K miles and a 99 Passat AEB wagon 140K miles, and I don't think there is a specific Catalytic converter instrument light, just a generic check engine light to inform you to pull the OBD II codes (there are hundreds of codes your Jetta can throw ... but not hundreds of lights on the dash;~) ).  If you don't overfill the car with oil, or drive like a maniac, the VW cats should last for 200-300K or better.  Of course I only wore out 40% of the original front brake pads in 100K miles in the Jetta too.  I know how to work on cars ... but prefer not to have to ... so I drive easy;~).

FYI - IF the cat is plugged up, your car will not have any power.  If you pass emission test and have poweer ... forget about the cat,  just read the codes

cheers
..ajm

SOURCE: how to replace a coolant temp sensor on a 2001 vw jetta 2.0

Yes it is that easy. It should be a 4 pin connector located on the transmission side of the engine head in a plastic flange. Best is to wait for the engine to be cold. Unscew the radiator cap to relieve pressure but screw it right back on. On the 2.0L engines when you unclip the coolant sensor little or not coolant loss will happen if you do this. Just unplug it, pull out the clip, pull out the sensor, and the seal which sometimes stays stuck. Install the new sensor with a new seal lubricated with some coolant, make sure it's well seated and reinstall the clip. The sensor is well seated if the clip fits right over the top, just make sure both sides clipped into position. Replug it fill the coolant with VW original coolant mixed 50-50 with water if needed and done. If you have a fault you might need a scanner to erase the check engine or fault in the cluster.

What's the reason for changing it? Eratic temperature readings?

SOURCE: transmission fluid check on a vw jetta tdi

TO CHECK OR ADD TRANSMISSION FLUID TO JETTA IT HAS TO BE BROUGHT IN TO A VOLKSWAGON DEALEALER THERE IS NO DIP STICK EVERYTHING IS SEALED SO ONLY THE MECHANIC CAN CHECK IT.

SOURCE: 97 VW Jetta TDI Timing Belt, How difficult is it?

Hi There,

Here's a step-by-step from some great guys over at TDIClub.com
for an AAZ (which I'm assuming you have)
http://www.tdiclub.com/articles/A3-TimingBelt/

It's pretty involved, and some special tools are needed. I've seen kits for sale
http://www.volkswaparts.com/Pre-1999TDITools.htm.