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San Diego, CA
I am not sure what you are referring to? "2 more in the rear" Do you mean rear calipers and rotors?
Your intermittent engine light will need to be diagnosed. I am not sure why the other shop could not diagnose the concerns. There is specific VW diagnostic software that will test the Catalytic converter efficiency and/or any other contributing failure that the computer may be detecting. As for the timing belt we strongly recommend replacement along with all the underlying components at 90,000. Timing belt failure will lead to valves bending which becomes a major repair.
A 3.0 HOV runs $250 Parts & Labor for the gasket set, labor, oil & filter. The warranty on repairs is 2yr/ 24K
Your vehicle should be a 3.0 OHV. A California certified convertor runs $ 790 parts and labor. You have 4 Oxygen Sensors which run aprox $ 122 ea installed. I would recommend to run the proper test on all the oxygen sensors and convertor before spending $$$$ on repairs the total test runs $ 69.95. David
It does sound like you have two seperate issues. I think the main concern is the incorrect fuel gauge problem. The fuel level is part of the fuel pump in the gas tank. You should have this cheked first as the fuel pump itself could possibly fail without any futher warning.
The problem you have described is most likely a thermostat sticking open and/or a plugged heater core that may need replacement.
The blend door is devise that regulated the amount of heat allowed into the vehicle. It work like a dam, the more you open the more comes in. Some blend doors may not work to to electronic motor failing and/or actual blend door broken
Sounds with the ignition lock assembly is going bad. Best to replace before it locks and can not be turn
Hard to say, how did water get into the transmission in the first place? If the car had not been started with "water" in the transmission and complete flush my save the transmission. Unfortunatly their is no way to determine short of a flush.
A timing belt failure does not set any codes specific to the belt. But if the belt brakes the can sensor will register a fault because it senses something out of range. From here you will need to replace the failed belt and then see if any damage has occured to the valves once the mechanic timing is corrected.