Case Study 1: The Rough-Idling F30
The Diagnostic Verdict Our lead diagnostic tech connected the vehicle to our dedicated dealership-level ISTA+ OEM diagnostic system. A full vehicle scan revealed fault codes $130304$ and $130104$, pointing directly to a Vanos intake/exhaust camshaft correlation/offset error. To determine if this was a stretched timing chain or a simple hydraulic control issue, we conducted a manual oil pressure check […]