What should you do?

In order to limit any possible inconvenience, please contact your authorized Audi
dealer as soon as possible to schedule this service. On or about November 19,
2019, the necessary repair instructions and parts will be available to your
authorized Audi dealer.

Lease vehicles and
address changes

If you are the lessor and registered owner of the vehicle identified in this action,
please forward this letter immediately via first-class mail to the lessee within ten
(10) days of receipt. If you have changed your address or sold the vehicle, please
fill out the enclosed prepaid Owner Reply card and mail it to us so we can update
our records.

Can we assist you
further?

If your authorized Audi dealer fails or is unable to complete this work free of charge
within a reasonable time, please contact Audi Customer Relations Monday through
Friday from 8AM to 8PM EST at 1-800-822-2834 or via our “Contact Audi Canada”
page at www.audi.ca.

We apologize for any inconvenience this matter may cause; however we are taking this action to help ensure
your vehicle continues to meet and exceed your expectations.
Sincerely,
Audi Customer Protection

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 6 of 22

Campaign Work Procedure

26M9 Emissions Service Action

NOTE
•

These repair instructions may differ from the labor operations and labor times listed in ELSA.

•

Damages resulting from improper repair or failure to follow these work instructions are the dealer’s
responsibility and are not eligible for reimbursement under this action.

•

This procedure must be read in its entirety prior to performing the repair.

•

Due to variations in vehicle equipment and options, the steps/illustrations in this work procedure may not
identically match all affected vehicles.

•

Diagnosis and repair of pre-existing conditions in the vehicle are not covered under this action.

•

When working during extreme temperatures, it is recommended that the vehicle be allowed to acclimate
inside the shop to avoid temperature-related component damage/breakage.

Repair Overview

•

Inspect and if necessary replace:
o

Reducing Agent Injector
-and/or-

o

•

Section A - Check for Previous Repair

•

Section B - Reducing Agent Injector Work Procedure (Criteria 01)

•

Section C - SCR Catalyst Work Procedure (Criteria 02)

•

Section D - Campaign Completion Stamp

•

Section E - Campaign Completion Label

•

Section F - Parts Return

•

Section G - California Only Requirements

SCR Catalyst

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 7 of 22

Required Parts
Criteria
01

Quantity

Part Number

Part Description

1

4H0.131.113.A

Reducing Agent Injector

1

3C0.253.725

Retaining Clamp
-AND/OR-

7L8.254.400.RX

SCR Catalyst (2010 MY)

4L0.254.400.AX

SCR Catalyst (2012 MY)

1

7L5.253.115.C

Gasket

1

3C0.253.115.A

Reducing Agent Injector Gasket

1

3C0.253.725

Retaining Clamp

1

1K0.253.141.AF

Dual Clamp

3

N 01024713

Replacement Stud/Bolt

3

N 91130802

Shouldered Hex Nut

1

WHT.003.487.A

Threaded plug

1

02

NOTE
The specified part numbers reflect the status at the start of this service action. Interim updates made in ETKA can
cause a listed part number to become unavailable. In this case, the new part number specified in ETKA should be
used.

Required Tools

Socket - 27mm
-T40218(or equivalent)

Special Tool # 582277
(or equivalent)

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 8 of 22

Repair Instruction
Section A - Check for Previous Repair
•

Enter the VIN in Elsa and proceed to the
“Campaign/Action” screen.

TIP
On the date of repair, print this screen and keep a copy
with the repair order.
•

Confirm the Campaign/Action is open .
If the status is closed, no further work is required.

•

Note the Applicable Criteria ID for use
in determining the correct work to be done and
corresponding parts associated.

•

All Safety Recalls MUST be completed before
starting this Campaign.

Proceed to Section B

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 9 of 22

Section B – Reducing Agent Injector Work Procedure (Criteria 01)
•

Remove clamp .

•

Leave injector electrical connector plugged in
and remove injector from the SCR catalyst.

•

Inspect the injector part number:
o

o

If part number 4H0.131.113.A is
present, no further work is required.


Vehicles with only Criteria
01 open, reinstall the
injector with a new gasket
and clamp, Proceed to
Section E.



Vehicles with Criteria 02
open, Proceed to Section D.

If any other part number is present or
if the part number is unknown:


Proceed to the next step
and replace the injector.

Replace Reducing Agent Injector:
NOTE
•

Lay a cloth below to catch any escaping
AdBlue reducing agent.

•

Make certain the electrical connector is
installed into the new Reducing Agent
Injector
-N474- before disconnecting the AdBlue
reducing agent feed hose. This will reduce
the possibility of contaminating the
electrical connection with AdBlue.

•

Disconnect the connector from the existing
Reducing Agent Injector -N474- .

•

Connect the connector to the new
Reducing Agent Injector -N474- and set it
aside.

•

Make certain the electrical connector is
installed into the new Reducing Agent Injector
before disconnecting the AdBlue reducing
agent feed hose.
This will reduce the
possibility of contaminating the electrical
connection with AdBlue.

•

Remove the AdBlue reducing agent hose
by pressing the release clasps and
remove the reducing agent hose .

•

Connect the AdBlue reducing agent hose
to the new Reducing Agent Injector -N474.

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 10 of 22

Install Reducing Agent Injector:
•

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

TIP
A new gasket comes pre-installed on a new injector.
•

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

Part Number

Description

3C0.253.725

Retaining Clamp

If Criteria 02 is open on the vehicle:
Proceed to Section C

If Criteria 02 is NOT open on the Vehicle:
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 11 of 22

Section C – SCR Catalyst Work Procedure (Criteria 02)
•

Inspect the SCR catalyst part number:
o

2012 MY: If part number 4L0.254.400.AX
is present, no further work is required.

o

2010 MY: If part number 7L8.254.400.RX
is present, no further work is required.


o

Proceed to Section E.

If any other part number is present or if
the part number is unknown:


Proceed to the next step and
replace the SCR catalyst.

Figure

Remove the NOx #2 sensor
from the catalyst pipe.

Figure

Cover the NOx #2 Sensor
with a plastic bag (or
equivalent) and secure it
out of the way with a tie
strap
(or
equivalent)
attached through either one
of two holes in the rear
driveshaft
mid-bearing
bracket .

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 12 of 22

•

Loosen the screw and remove the clamp from
the Reducing Agent Injector -N474-.

•

Leave the electrical connector and the Reducing
Agent Injector AdBlue feed line connected at this
This will reduce the possibility of
time.
contaminating the electrical connection with
AdBlue.

•

Secure the Reducing Agent Injector out of the way
with a tie strap (or equivalent).

•

Loosen the two nuts on the Dual Clamp
so the clamp can slide back and forth on the
exhaust pipe.

•

Leave the clamp in the installed position at this
time. This will assist in holding the SCR Catalyst
in place while removing the brackets in the next
step.

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