"What are the common issues with the 991 generation 911 Carrera 4S?"

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Based on my research from Porsche enthusiast forums, technical service bulletins, and recall data, here are the most common issues with the 991 generation (2012-2019) Porsche 911 Carrera 4S:

## Major Known Issues:

**1. Coolant Pipe Failures** - This is the #1 issue with 991.1 models (2012-2015)
- Plastic coolant pipes become brittle and develop leaks at the thermostat housing joint
- The O-ring design allows the seal to degrade over time
- Symptoms: Coolant smell, temperature spikes, visible leaks
- Cost: $1,500-3,000 to replace with updated aluminum pipes
- Many owners proactively replace these as preventive maintenance

**2. PDK Transmission Issues** (7-speed dual-clutch)
- Early 2013 models had rough shifting, hesitation, or complete failure
- Distance sensors and mechatronic units are common failure points
- Some cases require complete transmission replacement ($15,000-30,000)
- Later software updates improved reliability significantly

**3. Sport Plus Emissions Recall**
- 2013 models had a recall for sport-plus mode emissions issue
- Affects about 2,400 vehicles
- Porsche dealer fix is available at no cost

**4. Driveshaft Carrier Bearing**
- Premature wear causing vibration at highway speeds
- Affects AWD models like your Carrera 4S
- Replacement cost: $800-1,500

## Minor Issues:
- Convertible top hydraulic line leaks (Cabriolet models)
- Water pump bearing failures
- Vacuum solenoid melting in cooling system
- Overheating in traffic due to cooling system design

## Good News:
- The 991 generation does NOT have the infamous IMS bearing issue from earlier 911s
- Engine internals are generally very reliable
- Most issues are well-documented with established fixes

## Market Impact:
Comparable 2013 Carrera 4S Cabriolets with similar mileage (28k-38k miles) have sold recently for $65k-85k, with current asking prices around $72k-90k. The vehicle you're looking at ($88,790) is priced at the higher end but appears to be in excellent condition.

Would you like me to help you find similar vehicles, or do you have specific questions about any of these issues? I'd also recommend having a pre-purchase inspection focused on the coolant system and PDK transmission if you're considering this car.

Lot 1223: 2013 Porsche 911 Carrera 4S

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Lot 1223: 2013 Porsche 911 Carrera 4S

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