# Service bulletin Dealer Letter\-Up

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10121521
- Published by NHTSA: 2017\-10\-31
- Manufacturer's number: Dealer Letter\-Up
- Manufacturer's date: 2013\-11\-01
- NHTSA component: ELECTRICAL SYSTEM:IGNITION; ENGINE

## NHTSA's summary

This communication is to inform you of upcoming Update 28G6. There are 79,232 Audi vehicles affected in the U.S. by this Update. Rough idle or reduced driving power and, in turn, an illuminated Malfunction Indicator Lamp \(MIL\) on the instrument cluster due to the presence of specific fault codes caused by this component. Inspect and replace ignition coils as required.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2013/MC-10121521-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2013/MC-10121521-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine, Ignition

## Vehicles listed

- 2010 AUDI A4
- 2013 AUDI A4 ALLROAD
- 2011 to 2012 AUDI A4 AVANT
- 2010 to 2013 AUDI A5
- 2010 to 2013 AUDI A5 CABRIOLET
- 2010 to 2013 AUDI A6
- 2010 to 2011 AUDI A7
- 2012 to 2013 AUDI A7
- 2010 to 2013 AUDI Q5

## Other bulletins for the same vehicles and component

- [Update28G6](/bulletins/10250176.md), 2024-02-12, Service bulletin: ELECTRICAL SYSTEM:IGNITION. Ignition Coils
- [28G6UPDATE](/bulletins/10243834.md), 2023-10-10, Service bulletin: ELECTRICAL SYSTEM:IGNITION. Ignition Coils \(NVLW\)
- [A5723082027406\_5](/bulletins/10238172.md), 2023-07-10, Service bulletin: ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. This bulletin provides information regarding the Audi advanced key.
- [A9623822056019\_2](/bulletins/10232049.md), 2023-03-06, Service bulletin: ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:CONTROL MODULE. This bulletin provides instructions for when the anti\-theft alarm has gone off for no reason, or did not go off at all. No DTCs are stored.
- [Edition83](/bulletins/10231108.md), 2023-02-06, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:IGNITION. 97 no start
- [01145120305808](/bulletins/10225060.md), 2022-10-31, Service bulletin: ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. The remote key being used is transmitting incomplete immobilizer information to the vehicle, resulting in the condition.
- [01139720305806](/bulletins/10225052.md), 2022-10-31, Service bulletin: ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. The customer complains that the vehicle sporadically cannot be started. The remote key being used is transmitting incomplete immobilizer information to the vehicle; resulting in the condition.
- [01139520335611](/bulletins/10225050.md), 2022-10-31, Service bulletin: ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:IGNITION. Engine shakes. Some of the Bosch ignition coils installed in the affected vehicles may fail prematurely.
- [01139420305805](/bulletins/10225049.md), 2022-10-31, Service bulletin: ELECTRICAL SYSTEM:IGNITION:ANTI\-THEFT:IMMOBILIZER/PROXIMITY:KEY/SENDER. The remote key being used is transmitting incomplete immobilizer information to the vehicle; resulting in the condition.
- [01138620336301](/bulletins/10225042.md), 2022-10-31, Service bulletin: ELECTRICAL SYSTEM:IGNITION; ELECTRICAL SYSTEM. Because there are a number of different misfire faults \(unrelated to ignition coil operation\) that could cause the MIL to illuminate, proper Guided Fault Finding \(GFF\) misfire diagnosis must be followed before any ignition coils are replaced.

JSON: [/v1/bulletins/10121521](/v1/bulletins/10121521)

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