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This is a genuine OEM tandem vacuum pump for Volkswagen Group vehicles fitted with 1.9 TDI and 2.0 TDI diesel engines. The tandem pump combines vacuum generation for the brake servo system with diesel fuel supply functions, making it an essential component for engine performance and braking assistance.
Manufactured to OEM specifications, this unit ensures reliable vacuum pressure, stable fuel delivery, and direct fitment—ideal for replacing leaking, noisy, or faulty tandem pumps.
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Part Details:
* Genuine OEM part
* Part number: 03G145209C
* Also referenced as:
* 03G 145 209 C
* Vacuum tandem pump / brake vacuum pump
* Component: Tandem vacuum pump
* Fuel type: Diesel
* Mounting position: Cylinder head / camshaft driven
* Material: Cast alloy housing
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Compatibility:
Fits selected Volkswagen Group vehicles including:
* Volkswagen Passat B6
* Volkswagen Golf Mk5
* Volkswagen Touran
* Audi A3 8P
* Audi A4 B7
* SEAT Leon / Altea / Toledo
* Skoda Octavia Mk2
Compatible with:
* 1.9 TDI
* 2.0 TDI
Common engine codes include:
* BKD
* BKP
* BKC
* BLS
* BMP
* BMN
⚠️ Always match the exact part number before purchase, as several tandem pump variants exist.
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Function & Benefits:
* Generates vacuum for brake servo assistance
* Supplies diesel fuel pressure to injection system
* Maintains reliable braking performance
* Supports smooth engine operation
* Direct OEM replacement – no modification required
A faulty tandem pump can cause:
* Hard brake pedal
* Diesel leaks around pump
* Poor starting
* Fuel pressure faults
* Vacuum-related engine issues
Brand: Bosch
Type: Vacuum Pump
Interchange Part Number: 03G 145 209, 03G 145 209 C
Fitment Type: Direct Replacement
Manufacturer Part Number: 03G145209C
Surface Finish: Brand New