The E90 3 Series at high mileage splits by engine. N47 diesel is the risk. N52 petrol and N57 diesel are capable of 200,000+ miles. Real costs, reliability scores and weak points covered.
This High Mileage Guide guide combines structured analysis — verdicts, risk scoring and cost ranges where we have enough data — with real fault cases pulled directly from MyCarFault's reporting database, so the guidance below reflects what owners actually experience rather than manufacturer specifications alone. Background and analysis come first, followed by the linked fault reports and related guides you can jump to directly using the links above.
N47 diesel drags overall score down. N52/N57 would score 8+.
annual n47 independent: £800-1,400
annual n52 independent: £600-1,000
annual n57 independent: £900-1,500