BMW 4 Series Convertible

The Convertible body style was offered on 2 generations of the BMW 4 Series, and was not the same on each. Find the generation first.

F32 2014–2020

Convertible: The F33, with a three-part folding hardtop that takes up trunk space when lowered Edmunds, CarGurus, a published reference

Water trapped in the convertible's rear side panels All years

Check: Listen 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 of North America's bulletin says the rocker trim and underbody panel can sit too tight against the drain plugs, so water fills the lower rear side panels and can corrode the rear window regulators and motors, then reach the trunk's audio amplifier. It extends coverage of the drain repair to 15 years or 150,000 miles from first delivery. On a British owners' forum, owners of four convertibles in three threads report a rear window or the roof stopping working from water in the panel, and another found water running out of a sill after a car wash. BMW, owners' reports (unofficial)

Convertible: The G23, with a fabric roof, and all-wheel drive from 2022 Edmunds, a published reference