Modern vehicles are more electronically complex than ever before — and when something goes wrong, finding the root cause requires specialist knowledge, manufacturer grade equipment and genuine diagnostic expertise. At National AutoTec, we specialise in advanced vehicle diagnostics and complex fault finding across all vehicle makes and models — including prestige and European vehicles that have defeated every other workshop.

Our fully equipped mobile service brings dealer level diagnostic capability directly to your location — no towing, no waiting, no dealership prices.

Complex & Intermittent Fault Diagnosis Intermittent faults are among the most difficult electrical problems to diagnose — they come and go, they don't always trigger fault codes and they can affect multiple systems simultaneously. Our specialist diagnostic approach combines live data monitoring, wiring analysis and system testing to identify the root cause of even the most elusive faults.

CAN Bus Network Fault Diagnosis Modern vehicles use a CAN bus network to allow all electronic modules to communicate with each other. When the CAN bus develops a fault — through damaged wiring, a failing module or network corruption — the results can be catastrophic, affecting multiple systems simultaneously. We specialise in CAN bus fault diagnosis and repair — identifying exactly which component is causing the network issue and rectifying it correctly.

Prestige & European Vehicle Diagnostics BMW, Mercedes-Benz, Audi, Porsche, Volvo and Land Rover vehicles require manufacturer specific diagnostic software and procedures that most workshops simply don't have access to. We use ISTA, XENTRY, ODIS and other manufacturer specific platforms to diagnose and resolve faults on prestige and European vehicles — at independent prices that are a fraction of dealership rates.

Pre-Purchase Vehicle Electronic Inspection Before purchasing a used vehicle — particularly an EV, hybrid or prestige vehicle — a professional electronic inspection can reveal hidden faults, crash data, airbag deployments and module issues that aren't visible to the naked eye. Our pre-purchase inspection includes a full diagnostic scan, crash data check, airbag and SRS verification, module integrity check and HV battery health report for EVs and hybrids. A detailed written report is provided — giving you complete confidence before you buy.

Pre & Post Repair Scanning Insurers now mandate pre and post repair diagnostic scanning on all modern vehicle repairs. We provide certified pre-repair and post-repair scans with detailed professional reports — accepted by all major insurers and providing panel shops with the documentation they need to close jobs.

Full System Scan Reports Every diagnostic job includes a comprehensive written report documenting all fault codes, affected systems, diagnostic findings and recommended repairs. Our reports are professional, clear and accepted by insurers, panel shops and fleet operators across Melbourne.