BMW 1er-Reihe F20/F21 M135i, 320 PS, 8-speed automatic, rear-wheel drive (2012–2015)

Research for this car

• Generation guide BMW 1 Series F20 (2011-2019): known problems and buying guide

  A workable used car with known weak spots. Prefer a 2016 or later car with a full service record, and check the timing chain and steering first.

• Gearbox guide ZF 8HP 8-speed automatic (BMW Steptronic): problems, costs and what to check

  A solid 8-speed when its fluid is changed on time. Buy with oil records and a clean scan, and avoid one that shudders or has run in limp mode.

Known issues for this car

Before you buy this car

From the generation guide

1. Lift the floor mats and press the carpet in both front footwells. Bad result: damp carpet, a musty smell, or rust on the floor.
2. Drive slowly and check the steering for stiffness, noise or play around the centre. A scanner reads the steering fault codes. Bad result: a steering warning lamp, a pull, or no record of steering work.
3. Lift the car and check the joints and shocks by hand. Bad result: play in the joints, leaking shocks or knocks over bumps.
4. Ask for the fault codes of the fuel system and whether the pump or injectors were replaced. A scanner is needed. Bad result: long cranking, rough idle, a check engine light, or no proof of work.
5. Check the coolant level and look for an overheating warning on a warm drive. Ask whether the water pump and thermostat were replaced. Bad result: a temperature warning, low coolant, or no pump work on a car with high mileage.
6. Ask a BMW dealer to check open recall campaigns for the car's VIN. Bad result: an open campaign for the steering, starter, brake booster or seat backrest.

From the gearbox guide

1. Read the gearbox fault memory with a BMW-capable scanner. Bad result: pressure or solenoid codes such as 4F84, 4F87, P189C or P0748, or a past limp mode.
2. Ask for fluid and filter invoices. Bad result: no fluid change by 80,000 to 120,000 km, or a change without an adaptation reset.
3. Drive the car from cold and select Drive and Reverse. Bad result: a hard 1-2 shift, or a delay of 1-3 seconds before the gear engages.
4. Drive 15 minutes in town, then under load. Bad result: jerky 2-3 shifts, flaring, slipping or a burnt smell.
5. Hold a steady light throttle at low speed. Bad result: a shudder or vibration, which points to the torque converter lock-up clutch.
6. Look under the car on a lift. Bad result: oil at the wiring connector on the case, on the plastic pan or on the cooler lines.

Running costs

ADAC figures for 15,000 km a year over 60 months

ADAC versions