Home >> Audi >> 2007 >> A4 Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Specifications >> 2.0L - Turbo Engine Mechanical, Engine Code(S): BPG, BWT >> 13 - Engine - Crankshaft, Cylinder Block >> Engine, disassembling and assembling >> Toothed belt drive, overview >> Loosening camshaft sprocket