# Service bulletin 26 13 17 2027945

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: 10212658
- Published by NHTSA: 2022\-05\-31
- Manufacturer's number: 26 13 17 2027945
- Manufacturer's date: 2013\-05\-15
- NHTSA component: ENGINE; POWER TRAIN:AUTOMATIC TRANSMISSION

## NHTSA's summary

Humming or metallic rattling noise from under the vehicle, heard most consistently during engine idle or slow acceleration. Initial inspection indicates that the noise is coming from the exhaust system. Relative movements in the rear mounting of the exhaust system \(rear silencer\).

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2013/MC-10212658-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2013/MC-10212658-9999.pdf)

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

## Components

Engine, Transmission and driveline, Automatic transmission

## Vehicles listed

- 2009 to 2013 AUDI A4
- 2008 to 2013 AUDI A5
- 2010 to 2013 AUDI A5 CABRIOLET

## Other bulletins for the same vehicles and component

- [3712672028053](/bulletins/10250453.md), 2024-02-20, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). TCM software update for downshift concerns
- [Update37H5](/bulletins/10249079.md), 2024-01-22, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN:AUTOMATIC TRANSMISSION:INTERNAL:CLUTCHES/BANDS:ACTUATORS/SOLENOIDS. Multitronic
- [37143120130025](/bulletins/10226530.md), 2022-11-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. ATF pan leaks
- [371422202898511](/bulletins/10226521.md), 2022-11-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); LANE DEPARTURE; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Transmission warning message in cluster \(P074100 stored in TCM\)
- [37139920290276](/bulletins/10226518.md), 2022-11-21, Service bulletin: LANE DEPARTURE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Transmission warning message in cluster.
- [37139720289859](/bulletins/10226516.md), 2022-11-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL. Transmission warning message in cluster, P074100 stored in TCM
- [37139620293059](/bulletins/10226515.md), 2022-11-21, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Harsh downshifts when braking or harsh 1\-2 upshift under acceleration
- [37138420293057](/bulletins/10226514.md), 2022-11-21, Service bulletin: UNKNOWN OR OTHER; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE. Harsh downshifts when braking or harsh 1\-2 upshift under acceleration
- [37138320328121](/bulletins/10226513.md), 2022-11-21, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE; UNKNOWN OR OTHER. Hesitation concerns, Harsh downshifts when braking or harsh 1\-2 upshifts.
- [37138120211933](/bulletins/10226511.md), 2022-11-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION \(PRNDL\); UNKNOWN OR OTHER. Harsh 2\-1 shift with automatic gearbox \(0B6\) \- A4, A5

JSON: [/v1/bulletins/10212658](/v1/bulletins/10212658)

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