Research · Minicompact Cars
2008 Porsche 911 Turbo CabrioletRecalls, problems, MPG & safety
NHTSA lists 0 safety recalls and 7 owner complaints for the 2008 Porsche 911 Turbo Cabriolet. Most complaints involve engine (4) and power train (2). The EPA rates it 18 mpg combined.
Combined MPG
18mpg
EPA · 2 versions
NHTSA overall
—
Not rated by NCAP
Safety recalls
0campaigns
NHTSA
Owner complaints
7
Top: engine
Fuel cost / yr
$4,300est.
EPA estimate, best version
Safety recalls
NHTSA campaigns for this model year
0 recalls found in NHTSA data for the 2008 Porsche 911 Turbo Cabriolet as of Nov 8, 2026.
Data from NHTSA Recalls API · synced Nov 8, 2026NHTSA vehicle page
Owner complaints by component
7 complaints filed with NHTSA · Jan 2008 – Feb 2022
- Engine4
- Power train2
- Structure1
- Visibility1
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 8, 2026NHTSA vehicle page
What owners report most
Verbatim excerpts from NHTSA complaints, by component
Engine
4 reports
“Catastrophic coolant loss due to failure of a known issue by manufacturer. The coolant loss resulted due to failure of the epoxy that held the hose to the manifold. The epoxy failure affected 3 of the hoses. This was part of a DOT bulletin affecting this model year. Failure on my vehicle came later after warranty had expired due to low mileage. Also in 2021 the rear lid spoiler failed (another known high failure issue known to manufacturer) due to hydraulic fluid loss. Both repairs came at a extremely high cost and manufacturer refused consideration for help unless vehicle was repaired at their own dealer. This after I had made contact and advised them of location of vehicle at a service facility that is recognized by manufacturer as a credible alternative to their dealer.”
Power train
2 reports
“FLYWHEEL BROKE THREE TIMES: 1ST REPLACEMENT: THE CAR WAS 20 MONTHS OLD, 16,515 MILES. 2ND REPLACEMENT: THE CAR WAS 37 MONTHS OLD AND HAD 37, 355 MILES (21,000 MILES LATER). 3RD REPLACEMENT: THE CAR WAS 49 MONTHS OLD AND HAD 49,624 MILES (12,000 LATER). *TR”
Structure
1 report
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 8, 2026
Engines, transmissions & drive
2 versions rated by the EPA
- EPA class
- Minicompact Cars
- Engines
- 3.6L 6-cyl turbo
- Transmissions
- Automatic 5-spd · Manual 6-spd
- Drive
- 4-Wheel or All-Wheel Drive
- Fuel
- Premium Gasoline
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
Data from EPA fueleconomy.gov · synced Nov 8, 2026EPA listing
EPA fuel economy by version
City / highway / combined, annual fuel cost and CO₂
EPA
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| 911 Turbo Cabriolet Auto 5-spd, 6 cyl, 3.6 L, Turbo · 4-Wheel or All-Wheel Drive | 15 | 23 | 18 | $4,300 | 494 |
| 911 Turbo Cabriolet Man 6-spd, 6 cyl, 3.6 L, Turbo · 4-Wheel or All-Wheel Drive | 15 | 24 | 18 | $4,300 | 494 |
- 18mpg comb.
- 18mpg comb.
Data from EPA fueleconomy.gov · synced Nov 8, 2026 · Fuel cost is EPA’s annual estimate (15,000 mi, 55% city)
NHTSA 5-Star Safety Ratings
1 tested variant
NHTSA has not published 5-Star Safety Ratings for the 2008 Porsche 911 Turbo Cabriolet as of Nov 8, 2026.
Data from NHTSA NCAP Safety Ratings API · synced Nov 8, 2026Vehicle 2683
Maintenance basics
General guidance, not the OEM schedule. Check your owner’s manual.
General guidance
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
- Engine oil & filter5,000–10,000 mi
6–12 months - Tire rotation5,000–7,500 mi
Every oil change - Engine air filter15,000–30,000 mi
1–2 years - Cabin air filter15,000–25,000 mi
1–2 years - Brake fluid—
2–3 years - Coolant60,000–100,000 mi
5–10 years - Spark plugs60,000–100,000 mi
— - 12V battery—
3–5 years
Typical intervals for modern cars. Severe service (towing, short trips, extreme heat or cold) shortens them.
2008 911 Turbo Cabriolet questions
How many recalls does the 2008 Porsche 911 Turbo Cabriolet have?
0 recalls found in NHTSA data as of Nov 8, 2026.
What are the most common 2008 Porsche 911 Turbo Cabriolet problems?
Owners filed 7 complaints with NHTSA. The most-cited components are engine (4), power train (2), structure (1). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
What MPG does the 2008 Porsche 911 Turbo Cabriolet get?
The EPA rates the 2008 Porsche 911 Turbo Cabriolet at 18 mpg combined, depending on engine and drivetrain (2 versions rated).
Data from NHTSA & EPA · synced Nov 8, 2026