Research · Minicompact Cars
2020 Porsche 911 Carrera 4SRecalls, problems, MPG & safety
NHTSA lists 0 safety recalls and 6 owner complaints for the 2020 Porsche 911 Carrera 4S. Most complaints involve engine (3) and power train (2). The EPA rates it 20 mpg combined.
Combined MPG
20mpg
EPA · 2 versions
NHTSA overall
—
Not rated by NCAP
Safety recalls
0campaigns
NHTSA
Owner complaints
6
Top: engine
Fuel cost / yr
$4,000est.
EPA estimate, best version
Safety recalls
NHTSA campaigns for this model year
0 recalls found in NHTSA data for the 2020 Porsche 911 Carrera 4S as of Oct 30, 2026.
Data from NHTSA Recalls API · synced Oct 30, 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 Oct 30, 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 Oct 30, 2026
Engines, transmissions & drive
2 versions rated by the EPA
- EPA class
- Minicompact Cars
- Engines
- 3.0L 6-cyl turbo
- Transmissions
- Automatic (AM-S8) · Manual 7-spd
- 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 Oct 30, 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 4S Auto (AM-S8), 6 cyl, 3.0 L, Turbo · All-Wheel Drive | 18 | 23 | 20 | $4,000 | 445 |
| 911 Carrera 4S Man 7-spd, 6 cyl, 3.0 L, Turbo · All-Wheel Drive | 17 | 24 | 20 | $4,000 | 443 |
- 20mpg comb.
- 20mpg comb.
Data from EPA fueleconomy.gov · synced Oct 30, 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 4S as of Oct 30, 2026.
Data from NHTSA NCAP Safety Ratings API · synced Oct 30, 2026Vehicle 15002
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 4S questions
How many recalls does the 2020 Porsche 911 Carrera 4S have?
0 recalls found in NHTSA data as of Oct 30, 2026.
What are the most common 2020 Porsche 911 Carrera 4S 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 4S get?
The EPA rates the 2020 Porsche 911 Carrera 4S at 20 mpg combined, depending on engine and drivetrain (2 versions rated).
Data from NHTSA & EPA · synced Oct 30, 2026