IsItAGoodCar
Reliability Guide

Common Problems with the
2009 Porsche 911 (997)

The 'Generation 2' (997.2) facelift in 2009 was arguably the most important update in modern 911 history. It introduced the completely new, direct-injection 9A1 engine, finally curing the IMS and bore scoring issues of the past.

What changed for 2009

  • •Introduction of the all-new 9A1 direct-injection engine, eliminating the IMS bearing entirely.
  • •Debut of the PDK (Porsche Doppelkupplungsgetriebe) dual-clutch transmission.

Common MOT watch-outs

  • !Wear on brake components, particularly if the car has been tracked.
  • !Minor fluid leaks from the new PDK transmission.
2
Known Issues
1
Serious
1
Moderate
0
Minor

All Known Issues

PDK Distance Sensor Failure

SeriousGearbox & Transmission

An internal sensor in the PDK gearbox fails, rendering the car undriveable. Porsche dealers typically quote £20,000–£30,000 for a full gearbox replacement as they do not repair internal parts. However, UK specialists like Ninemeister and Zuffenhaus can now repair the unit by replacing the faulty component with an upgraded T-Design9 sensor.

Est. Repair Cost: £4,500–£7,000 (Specialist Repair)
Warning Signs:

Transmission fault warning, Emergency transmission mode, Loss of reverse/even gears, Fault codes P1731, P1732, P1735

What to Inspect:
  • Check for smooth shifts
  • Scan for PDK-specific fault codes
  • Ask if the gearbox has already been repaired by a specialist
Verified by IsItAGoodCar Research Team

Cracked Ignition Coil Packs

ModerateEngine

The coil packs on 997 engines are prone to cracking and failing, causing misfires. A relatively inexpensive fix but common across all variants.

Est. Repair Cost: £200–£400
Warning Signs:

Engine misfire, Check engine light, Rough idle, Hesitation under acceleration

What to Inspect:
  • Scan for misfire codes
  • Inspect coil packs for visible cracks
Verified by IsItAGoodCar Research Team

Buying Tips for 2009 Porsche 911 (997)

  • ✓The 997.2 is vastly more reliable engine-wise; if budget allows, always choose a Gen 2 over a Gen 1.
  • ✓On PDK models, ensure the gearbox shifts smoothly and check the history for a vital PDK oil change at 60k miles.
2006–20082010–2011
Check a 2009 Porsche 911 (997) by Registration