Most 2016 1 Series petrols use small turbocharged engines (three- and four-cylinder) paired with an automatic gearbox (usually Aisin or ZF). The combo is smooth and responsive but petrol 1 Series are more expensive to run than diesels — look for evidence of regular oil changes and any gearbox fluid/service history. Some 2.0-litre BMW petrols from this era have known timing-chain or chain-guide wear on higher-mileage examples, so confirming the exact engine code from the VIN helps target known issues.

• Automatic gearbox service history and TCU software: watch for harsh/late shifts, and ask when the transmission fluid was last changed.
• Turbo and oil consumption: check for blue smoke at start, oil leaks at the turbo/feed lines and any excessive oil top-ups between services.
• Timing-chain/guide noise on 2.0 petrols (N20 family): listen for a rattle on cold start and ask about any past timing-chain work if mileage is high.
• Front wishbones and rear subframe bushings: uneven tyre wear or knocks over bumps indicate worn suspension bushes common on older BMWs.
• Start/stop battery and electrical items: ensure the battery health is good (start/stop function can mask wear) and test iDrive/electrics for glitches.