Research · Minicompact Cars
2018 Porsche 911 Carrera CabrioletRecalls, problems, MPG & safety
NHTSA lists 0 safety recalls and 1 owner complaint for the 2018 Porsche 911 Carrera Cabriolet. Most complaints involve electrical system (1). The EPA rates it 23–24 mpg combined.
Combined MPG
23–24mpg
EPA · 2 versions
NHTSA overall
—
Not rated by NCAP
Safety recalls
0campaigns
NHTSA
Owner complaints
1
Top: electrical system
Fuel cost / yr
$3,200est.
EPA estimate, best version
Safety recalls
NHTSA campaigns for this model year
0 recalls found in NHTSA data for the 2018 Porsche 911 Carrera Cabriolet as of Nov 9, 2026.
Data from NHTSA Recalls API · synced Nov 9, 2026NHTSA vehicle page
Owner complaints by component
1 complaints filed with NHTSA · Jan 2022 – Jan 2022
- Electrical system1
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 9, 2026NHTSA vehicle page
What owners report most
Verbatim excerpts from NHTSA complaints, by component
Electrical system
1 report
“The contact owns a 2018 Porsche Carrera. The contact stated while driving at 50MPH when the contact attempted to turn off their headlight switch on the vehicle but instead accidentally hit the ignition switch which caused the engine to shut off and the vehicle to coast on its own. The contact was able to veer to the side of the road and restart the vehicle and continue to drive to their residence. The contact concern was that headlight and ignition switch on the vehicle were so close together that its manufacturer design an error with the vehicle which could lead into an accident while driving the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 12,000.”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026
Engines, transmissions & drive
2 versions rated by the EPA
- EPA class
- Minicompact Cars
- Engines
- 3.0L 6-cyl turbo
- Transmissions
- Automatic (AM-S7) · Manual 7-spd
- Drive
- Rear-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 9, 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 Carrera Cabriolet Auto (AM-S7), 6 cyl, 3.0 L, Turbo · Rear-Wheel Drive | 22 | 28 | 24 | $3,200 | 365 |
| 911 Carrera Cabriolet Man 7-spd, 6 cyl, 3.0 L, Turbo · Rear-Wheel Drive | 20 | 29 | 23 | $3,350 | 388 |
- 24mpg comb.
- 23mpg comb.
Data from EPA fueleconomy.gov · synced Nov 9, 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 2018 Porsche 911 Carrera Cabriolet as of Nov 9, 2026.
Data from NHTSA NCAP Safety Ratings API · synced Nov 9, 2026Vehicle 12712
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.
2018 911 Carrera Cabriolet questions
How many recalls does the 2018 Porsche 911 Carrera Cabriolet have?
0 recalls found in NHTSA data as of Nov 9, 2026.
What are the most common 2018 Porsche 911 Carrera Cabriolet problems?
Owners filed 1 complaints with NHTSA. The most-cited components are electrical system (1). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
What MPG does the 2018 Porsche 911 Carrera Cabriolet get?
The EPA rates the 2018 Porsche 911 Carrera Cabriolet at 23–24 mpg combined, depending on engine and drivetrain (2 versions rated).
Data from NHTSA & EPA · synced Nov 9, 2026