BMW 750i
BMW's first hot-V eight-cylinder sounds like a rich, throaty V8 growl in Sport mode — though often more muted inside than expected, as the turbines in the V-channel filter the characteristic frequencies. The design was revolutionary, but the first generation suffered badly from heat soak: piezo injectors, extreme oil consumption and timing chain problems forced BMW to issue a Customer Care Package in 2014. Buying advice: only with complete service history and CCP documentation, then immediately shorten oil change intervals to 5,000 km.
V8 Prestige with First-Gen N63 Gamble
Commanding V8 note in the luxury class, but the first N63 generation is a known headache. Without a complete service history and Customer Care Package proof: walk away.
Engine Weaknesses 7
Valve stem seals harden from the extreme heat build-up in the hot-V and allow oil into the combustion chamber. Oil consumption of 1 L/1,500 km is typical; extreme cases reach 1 L/500 km. Piston ring coking and engine damage from around 100,000 km.
Symptoms: Blue smoke on cold start or after a standstill phase, severe oil consumption without visible external leaks, oil deposits in the exhaust
Piezo injectors fail after cold starts or extended standstill. Uncontrolled injection quantities cause hydraulic hammer that damages connecting rod bearings and cylinder walls. BMW replaced injectors under the Customer Care Package (2014).
Symptoms: Judder on cold start, misfires, rough running, engine cuts out, check engine light P0301–P0308
The timing chain stretches from 80,000–120,000 km. Plastic guide rails break and block the oil system, which can cause total engine failure within minutes. Complete replacement including engine removal takes approximately 40 labour hours.
Symptoms: Rattling on cold start, engine warning light, irregular running quality, in the worst case engine shutdown
The turbochargers sit in the V-valley and are exposed to extreme heat. Oil in the turbo feed lines carbonises when the engine is shut down immediately after high-load driving. Turbocharger damage with oil leaks and power loss follows.
Symptoms: Blue smoke from the exhaust, whistling from the engine bay, significant power drop, pressure loss in the charge air system
The direct injection high-pressure pump fails and generates insufficient rail pressure. The engine will not start or stalls while driving. Replacement is unavoidable; repair is not possible.
Symptoms: Engine will not start or dies under acceleration, rough running, fault code rail pressure too low (P0087), significant power loss
Bleed hoses between the turbochargers crack from sustained heat exposure. Coolant only leaks under operating conditions without dripping onto the floor — making the fault difficult to locate.
Symptoms: Coolant warning light without visible leak, coolant loss without puddle under the vehicle, coolant smell in the engine bay
Direct injection without intake valve flushing leads to deposits on the intake valves. Power loss and rough running follow. Walnut blasting every 60,000–80,000 km is recommended.
Symptoms: Rough idle, power loss especially when pulling away, increased fuel consumption
Vehicle Weaknesses 8
N63 V8 (750i/Li) has inherently high oil consumption: turbos in the V-valley subject the oil to extreme heat.
N63 V8 has known timing chain problems: chain stretches, tensioner breaks. In worst case engine damage.
Control units in the boot can corrode through moisture ingress. The HSR control unit next to the battery is particularly at risk.
The parking brake cable rubs against the rear aluminium control arm. The control arm can crack under load. Replace both sides simultaneously.
Air suspension bellows become porous after 4–6 years. Car sags on one side overnight.
The integral active steering actuator develops internal rust under the bellows after years of use.
The rubber drain tubes from the sunroof cassette become porous or detach from the connectors. Water collects in the headlining and enters the cabin.
The valve cover gasket on N63 and N54 engines in the F01 leaks over time, particularly through thermal stress on the turbocharged engines.
Reports & Tests
16 owner complaints filed with NHTSA (2008–2015). Most reported: Engine (5), Fuel System (2), Powertrain (2).