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    Audi A4 B6 2.5TDI V6 sudden loud knocking now not idling or driving with smoke

    Try a couple of simple checks first. See is the lift pump in the tank pumping diesel by slackening the small bleed screw on top of the diesel filter and just hit the starter for a second. You should get a spurt of diesel from the bleed screw (use plenty of rags to catch the fuel). If not the...
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    Audi A4 B6 2.5TDI V6 sudden loud knocking now not idling or driving with smoke

    0550 is start of injection regulation fault generally caused by failure of the vp44 injection pump. It's a common fault on the v6 2.5 TDI engine usually due to failure of the ECU on top of the pump. The pump sits in the v of the engine and with heating and cooling over time the soldered joints...
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    Drivers Door lock problem

    The latch is broken so it doesn't flip back as it should. Get one from a breakers yard and change it as it cant be repaired.
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    2.5 v6 tdi 01318

    They do. There is a 3 way match needed between the engine ECU, dash cluster and pump ECU. You will need someone to read the pin code from the car and code the replacement pump. I have a notion that you might need the pin from the donor car as well but can't remember for sure . Reconditioned...
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    2.5 v6 tdi 01318

    It's the ECU on top of the pump the usually goes on these. The crimp connectors are probably from an earlier repair when the ECU was removed with the pump in situ and sent off to be fixed. It's never the answer as these pumps need to be set up on a test bench. I'm afraid the pump will need to...
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    2.5 tdi starting issues

    Test the glow plugs with a multi meter before you change any and then only change any that are faulty. I think its .03 ohms resistance from memory but I am sure you will find the technical spec on here somewhere. These are very hard to change without breaking them. Make sure engine is hot...
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    Reverse light switch location a4 b6 8e 2.5 v6 tdi Quattro

    You may go to the dealer and get them to look it up because that's what is listed. I checked 2 other parts listings and both show the same. If you look again both the petrol and diesel engines are shown on the diagram. The diesel is just below and the ake is definitely listed.
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    Reverse light switch location a4 b6 8e 2.5 v6 tdi Quattro

    It is. Look at the engine codes list.
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    Reverse light switch location a4 b6 8e 2.5 v6 tdi Quattro

    The link below shows the switch location. https://audi.7zap.com/en/rdw/audi+a4+avant/a4/2003-249/9/919-919061/
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    Esp light

    That's your problem. Steering has an optical sensor that throws an error if it's off centre. Get it tracked again and it will be solved.
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    2003 2.5TDI V6 Intercooler

    Yes. It needs the front panel released and moved forward at least on the side being replaced to get enough room to remove it.
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    2003 2.5TDI V6 Intercooler

    Lights out, bumper off, move front into service position. Then slacken and remove boost hoses and they just lift out. Put a bit of wd40 on the bottom mounting rubber to help the intercooler slip into place when fitting the new one.
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    Drivers side window not going down

    The wires break in the rubber cover on the hinge side of the door. Pull the cover off and there's a clip there to undo that disconnects the loom from the door. A bit of delicate soldering will most likely be needed. Could also be the switch so check that too.
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    Hole in rear of engine!

    It looks like the oil pressure relief valve may be missing. The link above is for the block but the one below is for the head which I think shows what you need. https://audi.7zap.com/en/rdw/audi+a4+avant/a4/2002-249/1/103-103060/
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    Heating issues

    I had exactly the same symptoms as you. Only blew warm when giving it some stick and under normal conditions bottom hose warm and top hose cold. Heater matrix is likely stuffed with crap. Check by removing the top hose with the engine running. It is likely just dribbling through or not running...
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    2.5 v6 tdi poor start when cold, HELP!!

    Be very careful when removing glow plugs. They can snap in the head without warning. Make sure engine is hot and I recommend soaking them in plus gas for a couple of days before attempting to get them in out. If any break you have real problems. You can test them with a multimeter without...
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    2.5tdi V6

    Check the inlet hose especially where it connects to the turbo. They split at the jubilee clip and it throws up a false maf error code.
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    Oil leaks 2.5 TDI Engine

    Clean well around the injector seals and then get a small screwdriver to push a cloth right into the groove to clean it as well as possible. I use thinners on the cloth to remove as much of the oil as possible. Dry off well and get a fine nozzle to place gasket sealant into the groove and run...
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    2.5 tdi injection pump swapping

    01268 Quantity Adjuster (N146) Defect. But the this is all within the pump so a QA fault means a pump fault. Just bear in mind you have only tested the ECU on this pump and not the pump itself. I'm not a fan of fixing the ecu as a standalone thing. These pumps are precision built and the ecu...