M Buyers Guide

Inspection checklist

M235i F22, 2014 to 2016

Printed October 29, 2026. Tick each item at the viewing, and write down what you find.

Before you go

Open recalls. Run the VIN through NHTSA or a BMW dealer and ask for proof every recall was done.
History report. Check the title, accidents, owners and mileage record.
Service records. Ask for them in advance, ideally from a BMW dealer or specialist.
Independent inspection. Book a pre-purchase inspection with a shop that knows this engine.

Known problems on this car

Electric water pump and thermostat failure about $1,500 to fix
Look for a water pump and thermostat replacement in the records, and treat an original pump on a car past about 70,000 miles as due. Check for coolant warnings in the history.
Oil filter housing gasket leak about $600 to fix
Look at the housing, on the intake side of the engine, and the drive belt below it for oil. A shiny or oil-soaked belt means fix the gasket and replace the belt before driving on.
Valve cover and oil pan gasket leaks about $1,300 to fix
Look for oil along the valve cover edge and burning-oil smells after a drive, and have the underside checked on a lift for oil at the pan.
Charge pipe cracking about $450 to fix
Ask whether a stronger aftermarket charge pipe has been fitted, and on a test drive check for a sudden loss of power at full throttle.
Fuel tank leak about $1,750 to fix
Look under the car on the driver's side for wet fuel or staining, sniff for fuel after a fill-up, and scan for fuel tank leak codes. A BMW dealer can confirm by VIN whether the 15-year cover applies.

At the viewing

Records for the electric water pump and thermostat.
A dry oil filter housing.
Valve cover and oil pan (a shiny, oil-soaked drive belt means stop and fix it).
A stronger aftermarket charge pipe or a crack-free original.
No coolant smell or low-coolant warnings.
Oil changes every 5,000 to 7,500 miles rather than BMW's 10,000.
The tune history (many N55s have been tuned).
A receipt for any M Performance limited-slip differential.
A VIN check for open recalls (a fuel pump recall on early 2014 cars and two head air bag recalls on some 2014 and 2015 coupes).
No wet fuel or fuel smell under the driver's side.
Where the tank's welded top plate can leak (BMW covers it for 15 years).
On manual cars a clutch that does not slip.

Notes

From the M235i F22 guide at M Buyers Guide. Repair costs are the guide's estimates, not quotes; the guide says where each comes from. Problems and costs as of the date printed.