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Common Problems with the
2017–2019 Porsche 911 (991)

We've identified 3 known issues that can affect the 2017–2019 Porsche 911 (991). None are considered critical, but they're worth knowing about before you buy.

3
Known Issues
0
Serious
3
Moderate
0
Minor

The 2017–2019 period has 1 more issue than the Porsche 911 (991) average across all year periods.

All Known Issues

Dynamic Engine Mount (PADM) Failure

ModerateSuspension & Chassis

The electromagnetically controlled engine mounts fail internally, triggering a dashboard warning.

Most affected: Models with Sport Chrono package

Estimated cost: £1,000–£1,400 per sideAffects: 2012–2019Often appears around: 20k-50k miles

Typical symptoms

  • •PADM Fault message
  • •Increased vibration at idle

What to inspect before you buy

  • ✓Check for active fault codes
  • ✓Listen for engine movement during gear changes

Water Pump Failure

ModerateCooling System

The water pump bearing or impeller can fail, causing coolant loss and overheating. The 991.2 has an extended warranty from Porsche for this issue.

Most affected: All models

Estimated cost: £600–£1,000Affects: 2012–2019Often appears around: 30k-60k miles

Typical symptoms

  • •Coolant leak
  • •Overheating warning
  • •Grinding noise from engine bay

What to inspect before you buy

  • ✓Check for coolant residue around pump area
  • ✓Inspect water pump pulley for play

Cracked Ignition Coil Packs

ModerateEngine

Coil packs can crack and fail, causing misfires. Common across all 991 variants and relatively inexpensive to fix.

Most affected: All models

Estimated cost: £200–£400Affects: 2012–2019Often appears around: 30k-60k miles

Typical symptoms

  • •Engine misfire
  • •Check engine light
  • •Rough idle

What to inspect before you buy

  • ✓Scan for misfire codes
  • ✓Visually inspect coil packs

Buying Tips for the 2017 Porsche 911 (991)

  • ✓Check for "PADM Fault" messages; the active engine mounts are a frequent failure point.
  • ✓Inspect the door panels for warping; the trim can lift away from the window line.
  • ✓Ensure the radiator fans are silent; they can become noisy if debris is trapped.
2012–2016 Porsche 911 (991)

Browse 2017–2019 Porsche 911 (991) in our Directory

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Other Porsche 911 (991) Year Periods

2012–20162017–2019

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