Mechanical
Timing belt
A rubber belt synchronising crankshaft and camshafts — must be replaced on schedule or the engine destroys itself.
Most modern Subaru, Honda, Hyundai/Kia and older Toyota engines use timing belts. Replacement interval is typically 100,000–150,000 km or 6–10 years (whichever first). A snapped belt on an interference engine bends valves — engine rebuild or replacement. Always confirm the last belt service with a stamped logbook entry.
Related terms
Timing chain stretch
A common failure mode on VW/Audi 2.0 TFSI, Ford Ranger 3.2L and Nissan QR25 engines.
Logbook service history
Stamped manufacturer service records — the single strongest signal of mechanical condition.
DPF (Diesel Particulate Filter)
A soot trap in modern diesel exhausts that requires periodic high-speed driving to self-clean.
EGR (Exhaust Gas Recirculation)
An emissions valve that routes exhaust back into the intake — a notorious carbon-clog point on diesels.
Need a real inspection, not just a definition?
Aussie Auto Care does mobile pre-purchase inspections and EV battery health checks across Greater Sydney — 7 days.