Balance Shaft Module / Oil Pump for Volkswagen & Audi 2.0 TDI - 03G103295AK - Genuine. Part Number: 03G103295AK (03L103157). Also equivalent to the following part numbers: 03G103295AQ 03G103295AL 03G103295K 03G103295N 03G103295AL 03G103295AN 03G103295L 03G103295AD 03G103295D 03G103295H 03G103295G 03G103295AG 03G103295N 03L115105 03G103295AN 03L115105D Manufacturer: OEM / Audi Original Factory Equipment Application(s): 2.0 TDI engines equipped with a balance shaft module. Each balance shaft module is interchangeable with any other. The differences can be found in the oil pickup tubes, which can be re-used from your old unit, and fitted to this one. This part is used on the engine codes in the below table. You can find your engine code located on your VIN plate. BKP BRF CAGC BLB BRT CAHA BMA BUZ CAHB BMP BVA CBAA BMR BVF CBAB BNA BVG CBBA BPW BVH CBBB BRD CAGA CMEA BRE CAGB If you're not sure if this part will fit your vehicle, please send us a message and we can help figure it out. Description: The early Audi/VW Balance Shaft Modules are well known to fail between 130,000 to 200,000km. It is very important to ensure your balance shaft module doesn't fail, because integrated into this unit is the oil pump. If you lose oil pressure, you can seriously damage your engine in a short amount of time. There are two different ways in which they fail: 1) The early version of these modules was chain-driven via sprocket on the crankshaft. This sprocket is known to lose its teeth, or, if left long enough, to break apart. This revised version of the balance module eliminates the chain drive and replaces it with solid gears for much increased reliability and longevity. These gears are included with the unit (as pictured) 2) The oil pump is driven by a hexagonal shaft. In the early versions, these shafts have a shallow seat, and the edges can become rounded. This causes the shaft to slip, and the oil pump loses its drive. This in turn lowers the oil pressure, or will cause the pump to stop moving oil at all. The later version has a deeper seat and improved shaft material to prevent rounding.
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