Audi Workshop Service and Repair Manuals

Removing and installing particulate filter

Removing –  Lift off engine cover panel (outside -1- and inside -2-) by pulling up evenly.

–  Unclip fuel and coolant hoses from air intake pipe (right-side). –  Remove bolt -1-. –  Remove air pipe (right-side) by lifting retaining clips -arrows- slightly.

–  Detach electrical connector -1- at intake manifold flap motor -V157-. –  Remove bolts -arrows- and detach intake manifold flap motor -V157-.

–  Unplug electrical connector -1- at exhaust gas recirculation valve -N18- with exhaust gas recirculation potentiometer -G212-. –  Move electrical wiring harness clear. –  Remove bolts -arrows-. –  Detach exhaust gas recirculation valve -N18- at intake manifold.   Note Shown from rear with engine removed for illustration purposes.

–  Unplug electrical connector -4- for Lambda probe -G39-.

–  Unscrew Lambda probe -3-. –  Remove temperature sender before particulate filter -G506--item 5-. –  Unbolt bracket -2- for pressure pipes. –  Detach pressure pipe -4- at particulate filter. –  Slacken retaining clamp -1- for particulate filter. –  Detach retaining clamp.

–  Remove front right wheel. –  Remove centre noise insulation -fasteners 1 ... 3-.

–  Remove noise insulation (right-side) -fasteners 1 ... 3-.

–  Unscrew temperature sender after particulate filter -G527--item 1- from exhaust pipe behind particulate filter. –  Unscrew pressure pipe -2- going to exhaust gas pressure sensor 1 -G450-.   Note The threaded connections are accessible through the wheel housing (right-side).

–  Unplug electrical connector -arrow- at exhaust gas pressure sensor 1 -G450-. –  Unscrew exhaust gas pressure sensor 1 -G450- and detach together with pressure pipes.

Vehicles with front-wheel drive: –  Unbolt heat shield -arrows- for drive shaft (right-side). –  Unbolt drive shaft (right-side) from gearbox flange. –  Push drive shaft (right-side) towards front of vehicle.   Note Take care not to damage the surface coating of the drive shaft. Vehicles with four-wheel drive: –  Remove propshaft → Rear final drive 02D, 0AV and 0BR; Rep. gr.39. –  Remove bevel box → Rep. gr.34.

All vehicles (continued): –  Unscrew bolts -1 ... 3- and remove pendulum support.

–  Remove nuts -1, 3- and bolt -2- and detach bracket for particulate filter.

–  Remove nuts -1- and -2- and detach rear cross member on vehicle underside. –  Disengage rear silencer and centre silencer at rubber mountings -arrows- and lower.

–  Remove nuts -arrows-. –  Remove lock washers -2- and -3-. –  Pull inner side of cover on vehicle underside down slightly until heat shield -1- for centre tunnel can be detached.

–  Unbolt bracket for exhaust system -arrows-. –  Take out particulate filter: turn it 180° clockwise and at the same time push engine/gearbox assembly slightly forwards. Installing Installation is carried out in the reverse order; note the following:   Note t  Renew gaskets and self-locking nuts. t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue. t  Fit all cable ties in the original positions when installing. –  Install temperature sender after particulate filter -G527- → Chapter. –  Install Lambda probe -G39- → Rep. gr.23. –  Install temperature sender before particulate filter -G506- → Chapter. –  Install exhaust gas recirculation valve -N18- → Chapter. –  Install intake manifold flap motor -V157- → Rep. gr.23. –  Install exhaust gas pressure sensor 1 -G450- → Rep. gr.23. –  Install pendulum support → Rep. gr.34. Vehicles with four-wheel drive: –  Install bevel box → Rep. gr.34. –  Install propshaft → Rear final drive 02D, 0AV and 0BR; Rep. gr.39. Vehicles with front-wheel drive: –  Install drive shaft → Rep. gr.40. All vehicles (continued): –  Install air pipes/hoses with plug-in connectors → Chapter. –  Align exhaust system so it is free of stress → Chapter. –  After renewing particulate filter, perform adaption in „Guided Functions“ → Vehicle diagnostic, testing and information system VAS 5051 Tightening torques

Component	Nm
Bracket for exhaust system to subframe	23
Front exhaust pipe to turbocharger	7
Bracket for particulate filter to particulate filter	23
Heat shield to cylinder block	35
Underbody cross member (front) to body	23
Pressure pipe to particulate filter	40
Air pipe (right-side) to bracket	8