Opel Astra H - ALL MODELS WITH DIESEL ENGINE 1.7 PROBLEM - Loud noise from the auxiliary drive belt. CAUSE - Alternator bracket support misalignment. REPAIR - Install the modified alternator bracket. Opel Astra H - ALL MODELS WITH DIESEL ENGINE 1.7, FROM 04/06/09 PROBLEM - The engine fails / shuts off when the vehicle is stopped. Poor gas response. .