Audi Workshop Service and Repair Manuals

Removing and installing particulate filter - vehicles with multitronic gearbox

Removing   Note All cable ties which are released or cut open when removing must be fitted in the same position when installing. –  Pull off engine cover panel -arrows-. –  Remove Lambda probe → Rep. Gr.23.

–  Vehicles with auxiliary heater: remove bolts -arrows- securing exhaust pipe for auxiliary/additional heater to noise insulation.

–  Open quick-release fasteners -1 … 3- and take off front and rear noise insulation.

–  Unscrew nuts -arrows-.   Note Disregard -item 1-.

–  Remove bolts -1- and -2- on bracket for front exhaust pipe.

–  Disconnect exhaust system at clamp -arrow-. –  Detach front exhaust pipe from threaded pins on particulate filter.

–  Detach vacuum line -3-.   Note Disregard items marked -1- and -2-.

–  Unscrew bolts -1- and nuts -2-. –  Remove bolts -arrows-. –  Remove exhaust gas recirculation cooler and lay it aside with coolant hoses connected.

–  Unscrew threaded pin -1- from exhaust manifold.   Note Disregard -item 2-.

–  Take electrical connector -1- for temperature sender before particulate filter -G506- out of bracket. –  Unplug electrical connector and move wiring clear. –  Unplug electrical wiring at exhaust gas pressure sensor 1 -G450--item 2-. –  Unscrew nut and detach exhaust gas pressure sensor 1 -G450- from bracket. –  Leave hoses connected and move exhaust gas pressure sensor 1 -G450- clear towards bottom of vehicle.

–  Unscrew nuts -1 ... 3- and lift out particulate filter. Installing Installation is carried out in the reverse order; note the following:   Note t  Renew gaskets and self-locking nuts. t  Hose connections and hoses for charge air system must be free of oil and grease before assembly. t  Secure all hose connections with the correct type of hose clips (same as original equipment) → Electronic parts catalogue. t  To ensure that the charge air hoses can be properly secured at their connections, spray rust remover onto the worm thread of used hose clips before installing. t  Fit all cable ties in the original positions when installing. –  Install temperature sender before particulate filter -G506- → Chapter. –  Install front exhaust pipe → Chapter. –  Install Lambda probe → Rep. Gr.23. –  Align exhaust system so it is free of stress → Chapter. –  After renewing particulate filter, perform "Adaption" in “Guided Fault Finding” mode → Vehicle diagnosis, testing and information system VAS 5051. Tightening torques

Component	Nm
Particulate filter to front exhaust pipe	25 1)2)
Bracket for front exhaust pipe to gearbox	25
Hose clips (9 mm wide)	3
Hose clips (13 mm wide)	5.5
l  1) Renew nuts. l  2) Coat threads and contact surface with high-temperature paste; for high-temperature paste refer to → Electronic parts catalogue.