Question 1

What is Bore Scoring (Gen 1) on the Porsche Porsche 911 (997)?

Accepted Answer

The Lokasil/Alusil cylinder liners degrade, causing the piston to score the walls. Eventually requires a full rebuild.

Question 2

What is PDK Distance Sensor Failure on the Porsche Porsche 911 (997)?

Accepted Answer

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.

Question 3

What is IMS Bearing (997.1) on the Porsche Porsche 911 (997)?

Accepted Answer

While the 997.1 uses a larger bearing than the 996, early 2005 models still use the smaller bearing. Later 997.1 cars use a larger, more robust bearing but failure is still possible.

Question 4

What is Cracked Ignition Coil Packs on the Porsche Porsche 911 (997)?

Accepted Answer

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

Question 5

What should I check when buying a used Porsche Porsche 911 (997)?

Accepted Answer

On 997.1 models, check if an IMS retrofit or a larger factory bearing is fitted.

Question 6

What should I check when buying a used Porsche Porsche 911 (997)?

Accepted Answer

Look for sootier residue on the left exhaust tip, which can be an early sign of bore scoring.

Question 7

What should I check when buying a used Porsche Porsche 911 (997)?

Accepted Answer

Verify the operation of the PASM dampers; leaking struts are common on S models.

Question 8

What years was the Porsche Porsche 911 (997) made?

Accepted Answer

The Porsche Porsche 911 (997) was produced from 2004 to 2012.

Porsche Porsche 911 (997)

Porsche 911 (997) Reliability & Common Faults

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