Porsche Turbo
The 4.8L biturbo in the Cayenne 92A Turbo is the flagship of the second Cayenne generation — 500 hp, up to 550 hp in the Turbo S. Technically identical to the familiar biturbo V8, but in the 92A chassis combined with better dynamics systems. Coolant lines are the preventive replacement that should happen at purchase or shortly after. The driving feel of a Cayenne 92A Turbo is remarkable despite the weight — physics is well disguised by software and suspension. An expensive engine to run, but an impressive vehicle.
Cayenne 92A Turbo: best generation
The Cayenne 92A Turbo is for many enthusiasts the best Cayenne ever built — better suspension than the 955, more power than the V6, and none of the hybrid complexity yet. 500 hp V8 biturbo, excellent PDK (from the facelift), and a driving feel that still reads as sporting despite the weight. High maintenance, but that's a known quantity.
Engine Weaknesses 7
Aluminium bolts on the camshaft adjusters break off. Timing chain loses tension. Engine damage possible. Check recall status!
Symptoms: Engine dies while driving, engine check light, safety systems fail
Aluminium bolts in the camshaft adjusters can shear off. Camshaft stops, pistons hit valves — total engine destruction. No official recall in Germany.
Symptoms: Engine bucks and dies suddenly, multiple fault codes simultaneously, camshaft no longer turning
Crankcase breather fails and draws oil into the intake tract or turbo. In documented cases this led to total engine failure through oil starvation.
Symptoms: Heavy blue smoke, extremely elevated oil consumption, turbo overheating
The Turbo V8 also sees plastic timing chain guides break down at high mileage. Cam tensioner bolt can loosen — service note: check tensioner bolt torque to 60 Nm regularly.
Symptoms: Code P0016 without driving noise, occasional timing chain rattle, oil pressure loss if tensioner is loose
Critical issue on 2011–2014 V8 Cayennes: the Loctite-bonded coolant pipes at the thermostat housing fail. On the Turbo V8 particularly problematic due to higher operating temperatures. Permanent fix: threaded-connection thermostat housing.
Symptoms: Coolant loss, visible pipe separation at thermostat, coolant temperature rising, white residue around thermostat housing
Twin-turbo V8 with elevated oil consumption. In addition to piston rings, turbo bearing seals contribute to the loss.
Symptoms: Oil level drops, smoke trail on throttle lift
On the Turbo V8 the boost operation accelerates diaphragm wear in the AOS. Oil emulsion enters the intake tract all the way to the turbos — thorough cleaning of intercoolers and intake pipes required.
Symptoms: High vacuum at oil filler opening, oil in intercoolers and intake pipes, elevated oil consumption
Vehicle Weaknesses 6
When turning to full lock, power steering assistance drops out briefly several times. Power steering pump overloaded or valve block faulty.
Level sensors and air suspension compressor fail through wear. Improved over the 955, but still a cost factor.
Blocked sunroof drains lead to water ingress. If the Bose sound system is fitted, the subwoofer in the boot can be damaged.
PDK gearbox and transfer case develop leaks. Oil loss at seals and shaft seals requires regular monitoring.
Rear doors develop rust at the door fold, often only 3-5 years after first registration. Porsche acknowledged the defects under warranty.
Climate control heats to maximum when A/C is switched off. Temperature sensor delivers invalid values. No fault codes stored.
Reports & Tests
254 owner complaints filed with NHTSA (2010–2017). Most reported: Powertrain (80), Engine (62), Other (53).