911 (997)
NHTSA Safety Ratings About NHTSA ratings
Engine Reliability Ratings
M97.70
3.6L 6-cyl Turbo / 480 hpView details
Complaint Breakdown
Known Issues
9A2 4.0
4.0L 6-cyl / 502 hpView details
Complaint Breakdown
Known Issues
Vehicle-Level Issues
These issues affect the Porsche 911 regardless of engine variant.
All Generations
Alternatives in Sports Car
Frequently Asked Questions
What are the most common 2005-2011 Porsche 911 problems?
The 2005-2011 Porsche 911 has accumulated 207 NHTSA complaints. The most frequently reported problem areas are Engine, Body/Trim, Transmission. As with any used vehicle, a pre-purchase inspection and vehicle history report are recommended.
Which Porsche 911 engine is most reliable?
The 2005-2011 Porsche 911 was offered with 2 engine options. Based on NHTSA complaint data, the 3.6L 6-cyl has the lowest complaint density and is considered the most reliable choice for buyers.
Is the 2005-2011 Porsche 911 a good used car?
The 2005-2011 Porsche 911 can be a solid used car purchase depending on trim, mileage, and maintenance history. With 207 total NHTSA complaints on record, prospective buyers should review the known problem areas and check for open recalls before buying.
How many NHTSA complaints does the 2005-2011 Porsche 911 have?
The 2005-2011 Porsche 911 has 207 complaints filed with NHTSA as of our latest data pull. Complaint counts reflect owner-reported issues and do not necessarily indicate defects or safety risks on their own.
What recalls affect the 2005-2011 Porsche 911?
There are 0 NHTSA recalls affecting some 2005-2011 Porsche 911 vehicles. Recall status varies by VIN — check the NHTSA recall database at recalls.nhtsa.dot.gov with your specific VIN to confirm which campaigns apply.
What should I check before buying a used Porsche 911?
Before buying a used Porsche 911, verify all open recalls are completed via the NHTSA VIN lookup tool. Pay particular attention to Engine, Body/Trim, Transmission, which are the most commonly reported problem areas. Request maintenance records, have an independent mechanic inspect the vehicle, and run a vehicle history report to check for prior accidents or title issues.
What are the NHTSA crash test ratings for the 911?
The 2011 Porsche 911 received an overall N/A-star safety rating from NHTSA. Frontal crash: N/A stars. Side crash: N/A stars. Rollover: N/A stars. Electronic Stability Control: Standard. Forward Collision Warning: No. Lane Departure Warning: No. These ratings are based on standardized crash tests conducted by the National Highway Traffic Safety Administration.
Data from NHTSA federal complaints database. 207 complaints analyzed. Data confidence: high. Last updated: 2026-04-07.