The belt tensioner roller has two holes in which the two pins of the Double Pin V159, VAG 3387, T10020 are inserted allowing them to turn the belt tensioner roller and to tension the timing belt.
Timing belt tensioner pins (OEM No. T10115, T40011)
Serpentine tension pin (OEM No. T10060/A)
[VW – Volkswagen]
Lupo, Polo 1.4 TDi PD
Golf, Bora, Polo 1.9 TDi PD
Beetle, Sharan 1.9 TDi PD
Passat 1.9 TDi PD
[AUDI]
A2 / A3 1.4 / 1.9 TDi PD
A4 / A6 1.9 TDi
A4 / A6 / A8 ALLROAD 2.5 V6 TDi