manuals for the latest information.******** Audi A4 Quattro Wagon (8K5) L4-2.0L Turbo (CAEB) Technical DIAGNOSIS AND REPAIR # 910842 Date: 080915

Audio System - Buzz/Hum/Hiss From Speakers

91 08 42

2018701/1

September 15, 2008

Vehicle Information

Radio reception and playback problems

Condition

The customer may report constant sound interference in the radio. The sound may be distorted, or a humming or hissing noise may be audible in all

speakers.

Technical Background

If the reception level is good, the problem may be caused by aftermarket equipment that is plugged into the cigarette lighter or one of the power

outlets. Insufficient radio interference suppression of rechargers and power supply units of mobile telephones, navigation systems and other

electronic devices may cause voltage interference in the on-board network.

484

Production Solution

Not applicable.

Service

1. Verify if aftermarket devices were installed in the vehicle.

2. Disconnect the aftermarket devices, if applicable.

3. Inform the customer if the interference disappears after removal of a plugged-in aftermarket device.

Warranty

This TSB is informational only and not applicable to any Audi warranty.

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service

manuals for the latest information.******** Audi A5 Cabriolet (8F7) L4-2.0L Turbo (CAEB) Technical DIAGNOSIS AND REPAIR # 910842 Date: 080915

Audio System - Buzz/Hum/Hiss From Speakers

91 08 42

2018701/1

September 15, 2008

Vehicle Information

Radio reception and playback problems

Condition

The customer may report constant sound interference in the radio. The sound may be distorted, or a humming or hissing noise may be audible in all

speakers.

Technical Background

If the reception level is good, the problem may be caused by aftermarket equipment that is plugged into the cigarette lighter or one of the power

outlets. Insufficient radio interference suppression of rechargers and power supply units of mobile telephones, navigation systems and other

electronic devices may cause voltage interference in the on-board network.

Production Solution

Not applicable.

452

Service

1. Verify if aftermarket devices were installed in the vehicle.

2. Disconnect the aftermarket devices, if applicable.

3. Inform the customer if the interference disappears after removal of a plugged-in aftermarket device.

Warranty

This TSB is informational only and not applicable to any Audi warranty.

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service

manuals for the latest information.******** Audi TT Quattro Roadster (8J9) L4-2.0L Turbo (CCTA) Technical DIAGNOSIS AND REPAIR # 910842 Date: 080915

Audio System - Buzz/Hum/Hiss From Speakers

91 08 42

2018701/1

September 15, 2008

110

Vehicle Information

Radio reception and playback problems

Condition

The customer may report constant sound interference in the radio. The sound may be distorted, or a humming or hissing noise may be audible in all

speakers.

Technical Background

If the reception level is good, the problem may be caused by aftermarket equipment that is plugged into the cigarette lighter or one of the power

outlets. Insufficient radio interference suppression of rechargers and power supply units of mobile telephones, navigation systems and other

electronic devices may cause voltage interference in the on-board network.

Production Solution

Not applicable.

Service

1. Verify if aftermarket devices were installed in the vehicle.

2. Disconnect the aftermarket devices, if applicable.

3. Inform the customer if the interference disappears after removal of a plugged-in aftermarket device.

Warranty

This TSB is informational only and not applicable to any Audi warranty.

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service

manuals for the latest information.******** Audi A4 Sedan (8K2) L4-2.0L Turbo (CAEB) Technical DIAGNOSIS AND REPAIR # 910842 Date: 080915

Audio System - Buzz/Hum/Hiss From Speakers

91 08 42

2018701/1

September 15, 2008

Vehicle Information

Radio reception and playback problems

Condition

The customer may report constant sound interference in the radio. The sound may be distorted, or a humming or hissing noise may be audible in all

speakers.

Technical Background

If the reception level is good, the problem may be caused by aftermarket equipment that is plugged into the cigarette lighter or one of the power

outlets. Insufficient radio interference suppression of rechargers and power supply units of mobile telephones, navigation systems and other

electronic devices may cause voltage interference in the on-board network.

478

Production Solution

Not applicable.

Service

1. Verify if aftermarket devices were installed in the vehicle.

2. Disconnect the aftermarket devices, if applicable.

3. Inform the customer if the interference disappears after removal of a plugged-in aftermarket device.

Warranty

This TSB is informational only and not applicable to any Audi warranty.

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service

manuals for the latest information.******** Audi A4 Quattro Sedan (8K2) L4-2.0L Turbo (CAEB) Technical DIAGNOSIS AND REPAIR # 910842 Date: 080915

Audio System - Buzz/Hum/Hiss From Speakers

91 08 42

2018701/1

September 15, 2008

Vehicle Information

Radio reception and playback problems

Condition

The customer may report constant sound interference in the radio. The sound may be distorted, or a humming or hissing noise may be audible in all

speakers.

Technical Background

If the reception level is good, the problem may be caused by aftermarket equipment that is plugged into the cigarette lighter or one of the power

outlets. Insufficient radio interference suppression of rechargers and power supply units of mobile telephones, navigation systems and other

electronic devices may cause voltage interference in the on-board network.

Audi A4 Quattro Sedan (8K2) L4-2.0L Turbo (CAEB) Page 478

Production Solution

Not applicable.

Service

1. Verify if aftermarket devices were installed in the vehicle.

2. Disconnect the aftermarket devices, if applicable.

3. Inform the customer if the interference disappears after removal of a plugged-in aftermarket device.

Warranty

This TSB is informational only and not applicable to any Audi warranty.

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service

manuals for the latest information.******** Audi S5 Quattro Coupe (8T3) V8-4.2L (CAUA) Technical DIAGNOSIS AND REPAIR # 910842 Date: 080915

Audio System - Buzz/Hum/Hiss From Speakers

91 08 42

2018701/1

September 15, 2008

Vehicle Information

Radio reception and playback problems

Condition

The customer may report constant sound interference in the radio. The sound may be distorted, or a humming or hissing noise may be audible in all

speakers.

Technical Background

If the reception level is good, the problem may be caused by aftermarket equipment that is plugged into the cigarette lighter or one of the power

outlets. Insufficient radio interference suppression of rechargers and power supply units of mobile telephones, navigation systems and other

electronic devices may cause voltage interference in the on-board network.

Production Solution

Not applicable.

Service

1. Verify if aftermarket devices were installed in the vehicle.

2. Disconnect the aftermarket devices, if applicable.

3. Inform the customer if the interference disappears after removal of a plugged-in aftermarket device.

Warranty

This TSB is informational only and not applicable to any Audi warranty.

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service

manuals for the latest information.******** Audi TTS Quattro Coupe (8J3) L4-2.0L Turbo (CDMA) Technical DIAGNOSIS AND REPAIR # 910842 Date: 080915

Audio System - Buzz/Hum/Hiss From Speakers

91 08 42

2018701/1

September 15, 2008

102

Vehicle Information

Radio reception and playback problems

Condition

The customer may report constant sound interference in the radio. The sound may be distorted, or a humming or hissing noise may be audible in all

speakers.

Technical Background

If the reception level is good, the problem may be caused by aftermarket equipment that is plugged into the cigarette lighter or one of the power

outlets. Insufficient radio interference suppression of rechargers and power supply units of mobile telephones, navigation systems and other

electronic devices may cause voltage interference in the on-board network.

Production Solution

Not applicable.

Service

1. Verify if aftermarket devices were installed in the vehicle.

2. Disconnect the aftermarket devices, if applicable.

3. Inform the customer if the interference disappears after removal of a plugged-in aftermarket device.

Warranty

This TSB is informational only and not applicable to any Audi warranty.

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service