Research · Minicompact Cars
2020 Porsche 911 Carrera 4 CabrioletRecalls, problems, MPG & safety
NHTSA lists 0 safety recalls and 6 owner complaints for the 2020 Porsche 911 Carrera 4 Cabriolet. Most complaints involve engine (3) and power train (2). The EPA rates it 20 mpg combined.
Combined MPG
20mpg
EPA · 1 version
NHTSA overall
—
Not rated by NCAP
Safety recalls
0campaigns
NHTSA
Owner complaints
6
Top: engine
Fuel cost / yr
$3,750est.
EPA estimate, best version
Safety recalls
NHTSA campaigns for this model year
0 recalls found in NHTSA data for the 2020 Porsche 911 Carrera 4 Cabriolet as of Nov 12, 2026.
Data from NHTSA Recalls API · synced Nov 12, 2026NHTSA vehicle page
Owner complaints by component
6 complaints filed with NHTSA · Feb 2020 – Sep 2026
- Engine3
- Power train2
- Fuel/propulsion system1
- Exterior lighting1
- Seats1
- Electrical system1
- Other / unknown1
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 12, 2026NHTSA vehicle page
What owners report most
Verbatim excerpts from NHTSA complaints, by component
Engine
3 reports
“COMPONENT THAT FAILED: A high-pressure fuel injector (cylinder 2). The failed injector and engine wiring harness are available for inspection on request. The vehicle is currently at an authorized dealer. WHAT HAPPENED: While driving at approximately 35-45 mph under light throttle in normal traffic, the engine began misfiring without warning. The misfire worsened rapidly over several seconds and the engine ran roughly enough that I pulled off the road. A strong burning smell was present immediately afterward. The vehicle has continued to misfire since. SAFETY RISK: The failure caused a sudden and unexpected loss of engine performance while the vehicle was moving in traffic, with no prior warning. Had this occurred at highway speed, in a merge, or in an intersection, the loss of power could have created a serious hazard. The strong burning smell suggests unburned fuel reaching the exhaust system and overheating the catalytic converter, which raises a fire concern. CONFIRMED BY: Yes. An independent service center and an authorized dealer both diagnosed the failure. Ignition components were ruled out by swapping spark plugs and coils between banks; the misfire…”
Power train
2 reports
“Loss of power due to Injectors failure on acceleration. A reproducible pattern on HWY merges or passes for example. This is an issue that has been identified and experienced by other Porsche 992/718 owners. Issue discussed in the following thread: [XXX]”
Fuel/propulsion system
1 report
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 12, 2026
Engines, transmissions & drive
1 version rated by the EPA
- EPA class
- Minicompact Cars
- Engines
- 3.0L 6-cyl turbo
- Transmissions
- Automatic (AM-S8)
- Drive
- 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 12, 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 4 Cabriolet Auto (AM-S8), 6 cyl, 3.0 L, Turbo · All-Wheel Drive | 18 | 24 | 20 | $3,750 | 443 |
- 20mpg comb.
Data from EPA fueleconomy.gov · synced Nov 12, 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 2020 Porsche 911 Carrera 4 Cabriolet as of Nov 12, 2026.
Data from NHTSA NCAP Safety Ratings API · synced Nov 12, 2026Vehicle 15006
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.
2020 911 Carrera 4 Cabriolet questions
How many recalls does the 2020 Porsche 911 Carrera 4 Cabriolet have?
0 recalls found in NHTSA data as of Nov 12, 2026.
What are the most common 2020 Porsche 911 Carrera 4 Cabriolet problems?
Owners filed 6 complaints with NHTSA. The most-cited components are engine (3), power train (2), fuel/propulsion system (1). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
What MPG does the 2020 Porsche 911 Carrera 4 Cabriolet get?
The EPA rates the 2020 Porsche 911 Carrera 4 Cabriolet at 20 mpg combined, depending on engine and drivetrain (1 version rated).
Data from NHTSA & EPA · synced Nov 12, 2026