BMW's six-cylinder diesel with a front-mounted timing chain that's markedly less troublesome than its N47 sibling.
The N57 is a 3.0-litre diesel inline-six used across BMW's larger diesel models from the late 2000s onward.
Unlike the N47, the N57's chain is front-mounted and more accessible, though it can still wear over high mileage.
Swirl flaps can wear or stick, affecting intake performance.
Fuel injector seals can weep over time, leading to a diesel smell and rough idle.
Carbon build-up in the EGR cooler is a common wear item requiring periodic cleaning or replacement.
Keep up with EGR and injector maintenance, and have any timing chain noise checked at routine services.
Full BMW-specific diagnostic scan to identify the exact source of the issue rather than guessing.
Checking known leak points, wear items and service history against the N57's specific weak spots.
Confirming any rattle, misfire, or rough-running symptoms under real driving conditions.
Timing chain wear and swirl flap issues are the most common N57 faults, though both are generally less severe than on the related N47.
The N57 was used in 3 Series (335d), 5 Series (530d/535d), X5 (M50d) and 7 Series (730d).
A strong, well-regarded diesel six — more forgiving than the N47 thanks to its front-mounted chain.
Book a diagnostic with our BMW-trained technicians in Merrimu — serving Melton, Bacchus Marsh, and Melbourne's western suburbs.
