Checklist: F32 BMW 4 Series (2014–2020)

Look for 5

Known problems, and how to check for each.

Water trapped in the convertible's rear side panels All yearsListen for water sloshing in the rear side panels while driving, run each rear window and the roof, and look for water or a musty smell in the corners of the trunk. Ask whether the drains have been cleared. BMW, owners' reports (unofficial)
Timing chain stretch on the N20 four 2014–2016Listen for a rattle at idle, and ask whether the timing chain and its guides have been replaced. A seller's guide (unofficial)
Oil use and leaks on the N20 four 2014–2016Look for blue smoke when accelerating and oil around the valve cover, and ask how often the oil has needed topping up. A seller's guide (unofficial)
Oil leaks on the N55 six 2014–2016Look for oil around the valve cover, the oil filter housing and the oil pan. A seller's guide (unofficial)
Coolant leaks on the B48 four 2017–2020Look for coolant at the upper radiator hose and the oil filter housing. A seller's guide (unofficial)

Services to ask about 1

Scheduled work a seller can show records for. The F32's schedule has 1 more service, on its page. Buying shows which are due at a car's miles and age.

Engine oil and filter All yearsReplace every 6,000 miles, per a parts seller. Euro Premium Parts says not to rely on BMW's longer intervals. Ask for oil change records. A seller's guide (unofficial)

Recalls to ask about 13

Recalls filed for these model years, newest first. Not every car is covered; check the vehicle identification number with NHTSA.

What buyers avoid 1

What owners and the press say to steer clear of.

A 428i without timing chain or engine records 2014–2016Euro Premium Parts says the N20 four-cylinder cars are best avoided unless the engine has been rebuilt or carefully maintained. A seller's guide (unofficial)

Checklist: F32 BMW 4 Series 2014–2020

Look for 5

Services to ask about 1

Recalls to ask about 13

What buyers avoid 1