I just replaced both O2 sensors on our 2001 Jetta VR6. I was able to remove both using an open-ended wrench since I didn't have that special tool, but it's a bit hard to reach since both are located on the top of the converter-one at the input (near engine) and the other at the output (toward the rear end). I would recommend changing one at a time so that you don't accidentally swap them (front to back). A dealer told me to tighten gently (like a spark plug--no tighter). You might get an Check Engine light after working on the O2 system. That would need attention by a qualified person (maybe you!). Some parts distrributors such as Autozone, Advanced Auto etc can check for diagnostic codes that light-up the Check Engine lamp, and they can also clear those codes too. Not sure of exact location in that model, but one will be located in front of the catalyst - usually at the base of the manifold or just in front of the catalyst. The other will be just behind the catalyst. Fairly easy to remove. You need a special wrench or socket specifically for O2 sensors, about $10 - $15. ------------------------------------------
The speed sensor in located in the front of the motor. You can find it near the transmission and the engine split line on the Jetta.
The speed sensor on a 98 Jetta is located near the brake setup. It is on the passenger wheel area mounted to a bracket.
Which model is your engine?
on the front i think
A knock sensor sends a voltage signal to regulate ignition timing. In a Jetta, it is typically located under the air intake manifold.
The front crash sensor is located inside the airbag control module.
Should be located in a removable housing at the engine end of the upper radiator hose
where is crankshaft position sensor and camshaft position sensor on a 2004 Jetta 2.0 gl
The oxygen sensor on a 2004 Volkswagen Jetta is located in the engine area. It is usually encouraged to warm up the engine so as to ease the threads.
in the door lock/latch.
Is is located inside the distributor.
its located on the oil filter housing....
In side bell housing in the transmission.
right in front if the battery terminal on the transmission
The MAF ( Mass Air flow) sensor is located right on the intake pipe. Can't miss it.
remove the polin filter cover and you will find the AIT sensor next to the polin filter
The intake air temperature sensor is located just after the top of the intercooler. It will have color coded wires coming from it.
The mass airflow sensor, on Most VW Jetta Mark IV, is located on the air line that goes from the air filter to the intake.
Backside of the transmission
It is located in the distb. 4 inches under distributer behind the motor mount on 2.0 liter.
It is located almost adjacent to the oil filter and right beside the transmission bellhousing. The plug is located beside knock sensor plug attached to the motor mount.
where is the crankshaft position sensor on 2.5 liter vw jetta
It's on your air intake, Behind your air filter box its your maf/iat combination. but that's on my 2000 jetta 2.0??? ??? I need to know what 2 wires are for the IAT sensor???
at the rear of the engine block to the right of the oil filter.