BMW 5 Series F10 Common Faults: N63/N57, Air Springs and 8HP
The F10 (2010–2017) is a big comfortable 5 Series that still makes sense if you budget for the known list: pumps, bushes, diesel emissions and — on some cars — rear air springs.
F10 versus F11 and GT
F10 saloon, F11 Touring and F07 GT share engines and a lot of electronics. The GT and some 5 Series run rear air springs; a sagging rear corner in a Havering driveway is usually a spring, not “the compressor is tired” as a first guess. We measure heights and look at ISTA leak tests before quoting a compressor.
N57 diesel and N63 petrol
N57 six-cylinder diesels are strong but still eat EGR coolers, swirl-flap motors and DPFs in London use. Injector spill-return issues show as long cranks. N63 V8 petrols (550i) have a well-documented list: valve-stem seals, coolant pipework in the valley, and oil consumption. We will be honest if a 550i is a money pit relative to a 520d.
Electric water pump, thermostat and transfer case
Like the E90, many F10 petrols use an electric pump that fails without much warning. xDrive F10s add a transfer case that chatters on full lock if the oil is original at 100,000 miles. That job is a fluid service if caught early, a unit if not.
8HP and electronics
8HP services are overdue on almost every high-mile F10 we see. Junction-box and boot-module water ingress (blocked drain) creates ghost electrical faults. We check drains before replacing modules. Battery registration after a cheap replacement is still skipped by general garages — then start-stop and “increased battery discharge” never leave.
Running costs in London
A 520d F10 with records is still a comfortable A12 cruiser. Budget CBS oil from £279, inspection from the mid-£300s, and an 8HP service as a planned extra. Air-spring pairs on GT cars are the surprise that wrecks a cheap Facebook purchase. Inspect first at Hainault.