procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 13 of 22

•

With the assistance of a second technician,
remove the three nuts from the exhaust studs
securing the SCR Catalyst to the Diesel
Particulate Filter (DPF).

•

Remove the bolts from SCR Catalyst brackets at
locations with assistance from second
technician to support the SCR Catalyst while the
brackets are removed.

•

Slide the Dual Clamp towards the rear of the
vehicle, and with the assistance of a second
technician, remove the SCR Catalyst from the
vehicle.

•

Remove the Dual Clamp from the exhaust
pipe and discard.

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 14 of 22

NOTE

STOP!
Due to corrosion, one or more of the mounting studs
may break when removing the SCR catalytic
converter from the Diesel Particulate Filter (DPF) flange.
DO NOT use a hammer and punch, heat, air hammer,
or other method to remove the studs from the DPF.
Consequential damage to Exhaust Gas Temperature
Sensors, Diesel Particulate Filter, AdBlue Injector Feed
Line, or any other ancillary components WILL NOT BE
COVERED under this action due to damage from heat,
impact, or vibration.
Follow the steps below if one or more studs are broken
or damaged.

Special Tool # 582277

•

If stud replacement is necessary use Special Tool
# 582277, or a comercially available clevis pin
press such as an OTC 5057 or equivalent to press
any broken or damaged studs out of the DPF
flange.

•

It is advised if one stud breaks that all three studs
are pressed out and replaced with the bolts/nuts
included in the parts kit.

•

Install the replacement bolts and corresponding
nuts into the rear DPF flange.

Part Number

Description

Quantity

N 010.247.13

Replacement Exhaust
Bolt

3

N 911.308.02

Shouldered Hex Nut

3

OTC 5057

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 15 of 22

NOTE
Coat the threads on the nuts and exhaust studs/bolts
with hot bolt paste prior to installation. Refer to the
Parts Catalog.
•

Install the new exhaust Dual Clamp onto the
exhaust pipe at location and slide the clamp
to the rear of the vehicle, but do not tighten.

•

With the assistance of a second technician, install
the new SCR Catalyst with a new gasket between
the SCR Catalyst and DPF . Fit the SCR
Catalyst onto the DPF flange studs/bolts and
install new nuts and tighten to 23 Nm.

•

Slide the Dual Clamp into the installed position on
the SCR Catalyst, but do not tighten. This will
assist in holding the SCR Catalyst in place while
the exhaust system is properly tensioned.

•

Install the bolts for the SCR Catalyst brackets and tighten by hand.

Part Number

Description

Qty.

7L8.254.400.RX

SCR Catalyst (2010 MY)

1

4L0.254.400.AX

SCR Catalyst (2012 MY)

1

1K0.253.141.AF

Dual Clamp

1

7L5.253.115.C

Gasket

1

N 911.308.02

Shouldered Hex Nut

3

N 010.247.13

Replacement Stud/Bolt
(if necessary)

3

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 16 of 22

•

Tighten the Dual Clamp until there is a slight
dragging resistance on both the SCR Catalyst
pipe and the rear resonator/muffler
pipe , but do not tighten so much that
the pipes cannot slide in and out of the Dual
Clamp .

•

Pretension the rear resonator/muffler hanging
straps by pulling the rear resonator/muffler pipe
towards the front of the vehicle and
pulling the SCR Catalyst pipe towards the rear of
the vehicle .

In order to reduce harmonic
vibration,
the
rear
muffler/resonator
straps
require 12 mm of
forward tension, as shown
Pull
in the sub-photo.
forward
on
the
rear
muffler/resonator pipe and
insert the pipe deeper into
the Dual Clamp until this
dimension is achieved.
= Rear Resonator Hanging Straps

•

Once the desired
dimension of =
12 mm is achieved,
tighten the Dual
Clamp nuts to 23
Nm.

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 17 of 22

Figure

Front
Muffler/Resonator
hanging strap: = 4 mm
If equipped, loosen the
bolts
at
the
forward
resonator pipe hanging
strap and adjust the
bracket until = 4 mm of
forward tension.
•

Figures

Tighten the two
hanging strap bolts
to 23 Nm.

Left and Right SCR hanging
straps: = 0.00 mm,
install without tension.
If necessary, loosen the
bolts at the left and right
SCR Cat hanging straps and adjust the
brackets until = 0.00
mm. The SCR Catalyst
hanging straps are installed
tension free.

•

•

Tighten the two
hanging
strap
bracket bolts
to 60 Nm.

•

Tighten the two
hanging
strap
bracket bolts
to 23 Nm.

Install threaded plug in the bung for the particle
sensor and torque to 50 Nm.

Part Number

Description

WHT.003.487.A

Threaded plug

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 18 of 22

•

If necessary, align the tail pipes by first loosening
the screw-type clamp on the tailpipes.

•

Align tail pipe to the rear muffler and center the tail
pipes into the bumper cover.

•

Check distance of left and right tail pipes to
bumper.
o

•

Dimension -x- left = dimension -x- right

Once the tail pipe is properly aligned to the bumper
cover, tighten the screw-type clamps to 60
Nm.

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 19 of 22

If reinstalling original Reducing Agent Injector:
•

Install new gasket into the Reducing Agent
Injector -N474-.

•

Install the Reducing Agent Injector -N474- into the
SCR Catalyst pipe ensuring that the tabs on the
Injector fit into the corresponding
mounts in the SCR catalytic converter.

•

Install a new retaining clamp and tighten the
bolt to 5 Nm.

Part Number

Description

Quantity

3C0.253.725

Retaining Clamp

1

3C0.253.115.A

Reducing Agent
Injector Gasket (only if
required)

1

All Work Complete.
Proceed to Section D.

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 20 of 22

Section D – Campaign Completion Stamp
•

Once the campaign has been completed,
the technician should stamp the repair
order.

•

Stamps are available for ordering through
the Compliance Label Ordering Portal.

•

Proceed to Section E

Item#: AUD4927ENG

-OR-

Item # AUD4927FRE

Section E – Campaign Completion Label
Install Campaign Completion Label
•

Fill out and affix Campaign Completion
Label, part number CAMP 010 000, next to
the vehicle emission control information
label.

TIP
Ensure Campaign Completion Label does not cover
any existing label(s).
Proceed to Section F

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 21 of 22

Section F - Parts Return/Disposal
Parts Return/Disposal
SCR Catalyst:
•

The SCR Catalyst must be tagged with a blue zip
tie and returned in order to be
considered for core charge reimbursement.

All other parts:
•

Properly store (retain), destroy or dispose of
removed parts in accordance with all state and local
requirements, unless otherwise indicated and/or
requested through the Warranty Parts Portal
(WPP).

All Work Complete
Proceed to Section G (California only).

Section G – California Only Requirements
CALIFORNIA ONLY Requirements for Emissions Campaigns Having Customer Notification
The California Air Resources Board and the Department of Motor Vehicles (DMV) require emissions-related
campaigns to be completed prior to vehicle registration renewal. When campaign work is done you must provide
the owner with a signed “Vehicle Emission Recall – Proof of Correction” certificate (RC EMIS_CAL VW).
Certificates can be ordered at no cost online via the Compliance Label Ordering portal at www.accessaudi.com.

TIP
Ensure owners are aware of the importance of retaining the completed certificate for their records. It should
be mailed to the California DMV only upon request.

The repair information in this document is intended for use only by skilled technicians who have the proper tools, equipment and training to correctly and safely maintain your vehicle. These
procedures are not intended to be attempted by “do-it-yourselfers,” and you should not assume this document applies to your vehicle, or that your vehicle has the condition described. To
determine whether this information applies, contact an authorized Audi dealer. 2019 Audi of America, Inc. and Audi Canada. All Rights Reserved.
November 2019

26M9 Page 22 of 22