2026 Porsche 911 Problems: 4 Known Issues

On the 2020-2026 Porsche 911 3.0L twin-turbo flat-six (9A2 Evo), porsche Technical Information 88/20 ENU 3734, "Complaint - Oil Leaks on Double Clutch Transmission (Porsche Doppelkupplung PDK)," covers the 911 Carrera (992) from model year 2020 with the 8-speed automatic transmission (I-no. G1F) and the 8-speed all-wheel-drive transmission (I-no. G1G). Porsche publishes a full sequenced diagnostic covering leak locations on the right, left, upper, lower, rear and front faces of the transmission, and specifies that oil leaks must be clearly identifiable and reproducible with engine oil and coolant at operating temperature after a test drive, and that if oil is leaking from the final drive or hydraulic chamber breather both hoses must be disconnected to find the exact location. Leaks from the breather are a distinct condition from housing-seal leaks and are frequently misread as a case leak. Separately, 992 owners on Rennlist report PDK complaints including hesitation and delayed engagement pulling away from a stop, jerking in first and second gear, and intermittent transmission error messages that clear on restart; Porsche replaces rather than dealer-rebuilds a failed PDK, which makes an out-of-warranty failure very expensive.

On the 2025-2026 Porsche 911, porsche Technical Information 07/25 ENU 4883 applies to the 911 Carrera GTS (992), 911 Carrera 4 GTS (992), 911 Turbo (992) and 911 Turbo S (992) from model year 2025 equipped with rear axle steering (M-no. 0N5). The customer complaint is that "the yellow warning message 'Rear axle steering failed' in the instrument cluster lights up in conjunction with dynamic cornering." The rear axle steering control unit stores C1445F2 (malfunction of right servo motor, 000015) and C11D1F5 (travel blocked, 000028). Despite naming the right servo motor and a blocked-travel condition, Porsche's remedy is a control unit re-programming, which indicates the codes are a software artifact rather than a mechanically seized actuator. Rear axle steering is standard on the 2025 GTS models and on Turbo models, and the bulletin applies only to cars with M-no. 0N5 - a 992 without it cannot exhibit this.

On the 2020-2026 Porsche 911, porsche Technical Information 31/20 ENU 2706, "Diagnosis and Handling of 12-Volt Lithium-Ion Battery (On-Board Battery)," covers the 911 Carrera (992) alongside the Cayenne and Taycan and applies to cars fitted with the lightweight lithium battery (I-no. J2A). Porsche wrote the bulletin because "on vehicles in which a lithium-ion vehicle electrical system battery is installed, the battery is sometimes replaced even though it is not defective." When the battery's component protection function activates, "the 12-volt on-board power supply battery is disconnected from the vehicle via an integrated separating element and the vehicle is subsequently de-energized" - which the owner experiences as a completely dead car that cannot be unlocked or made ready to drive, and which workshops frequently interpret as a failed battery. The protection trip is temporary and reversible using the correct reset measures, so an owner of a lightweight-battery 992 should treat an unexplained total electrical shutdown as a protection event until diagnosis proves otherwise.

On the 2020-2026 Porsche 911, porsche Technical Information 40/21 ENU 4381 covers 911 Carrera (992) cars from model year 2020 fitted with the front-axle lift function (M-no. 2UH). The white warning message "Lift system fault - Service necessary" appears in the instrument cluster and the entry "C1365F8 - Measuring height fault (000302)" can be stored in the front-axle lift system control unit. Porsche states plainly that "this fault type can occur if the vehicle was parked with the body front end raised," and warns owners to "always park the vehicle at the lowered position, as the upper holding position cannot be guaranteed over a long period of time with the engine stopped." A large share of these faults are therefore induced by how the car is parked rather than by a failed component. Owners on Rennlist separately report hydraulic failures where the system lifts but will not come back down, and a case of a lift strut boot blowing out at around 7,500 miles and spraying hydraulic fluid into the wheel well - so a genuine hydraulic leak still has to be ruled out before assuming a parking-induced code.