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 remained on the same cylinder. Compression and cylinder leakdown tested normal, confirming the engine is mechanically sound. Scan tool data with the engine off showed the bank 1 high-pressure fuel rail losing pressure rapidly while bank 2 held normal pressure, indicating a high-pressure fuel leak. The dealer confirmed the fault as a failed fuel injector. INSPECTED BY MANUFACTURER: The authorized dealer inspected the vehicle and submitted a goodwill assistance request to the manufacturer, which was declined without a stated reason. Not inspected by police or insurance. WARNING SIGNS PRIOR TO FAILURE: None. No warning lamps, messages, drivability symptoms, or oil consumption preceded the failure. The only illuminated indicator was the low fuel level lamp, which is unrelated. The check engine light illuminated a
The worst 2020 Porsche 911 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Engine3
- Transmission2
- Electrical1
- Fuel system1
- Lights1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine3
- Transmission2
- Electrical1
- Fuel system1
- Lights1
Recalls 2
Back over prevention: sensing system: camera
- What is wrong
- Porsche Cars North America, Inc. (Porsche) is recalling certain 2019-2025 Cayenne, Cayenne E-Hybrid, 2020-2025 911, Taycan, 2024-2025 Panamera, and 2025 Panamera E-Hybrid vehicles. The rearview camera image may not display when the vehicle is placed in reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rear Visibility."
- Risk
- A rearview image that does not display properly reduces the driver's view behind the vehicle, increasing the risk of a crash.
- Remedy
- Dealers will update the driver assistance software, free of charge. Owner notification letters were mailed February 13, 2026. Owners may contact Porsche customer service at 1‑800‑767‑7243. Porsche's number for this recall is ASB2. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on beginning January 19, 2026.
Recall number 25V896000 · Recall details
Visibility: glass, side/rear
- What is wrong
- Porsche Cars North America, Inc. (Porsche) is recalling certain 2020-2024 911 vehicles. The front windshield and rear window may not be properly secured and can detach.
- Risk
- During air bag deployment, an unsecured windshield may not support the front air bags as intended, increasing the risk of injury in a crash.
- Remedy
- Dealers will inspect and replace the windshield and rear window as necessary, free of charge. Owner notification letters were mailed on August 30, 2024. Owners may contact Porsche customer service at 1‑800‑767‑7243. Porsche's number for this recall is ARA3.
Recall number 24V155000 · Recall details
Technical service bulletins for the 2020 Porsche 911 738
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Technical Information for Warranty Extension for Front Door Wiring Harness related to Real Top View (RTV)...
- Warranty Information: Warranty Extension for Transmission Electronics Control Unit (18/26)
- Parts Information for Parts Withdrawal
- Parts Information for Parts Withdrawal
- Parts Information for Parts Withdrawal
- Parts Information for Parts Withdrawal
- Advanced Technical Information for Paint Thickness or Decals Affecting Corner Radar Sensor Operation
- Parts Information for Parts Withdrawal
- Technical Information for Particles/Metal Chips/Residues in Engine Oil
- Technical Information for Wind Noises when Driving from the Sunroof Area
2020 Porsche 911 fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 3.0L 6‑cyl | RWD | 17-18 | 23-25 | 20 |
| 3.0L 6‑cyl | AWD | 17-18 | 23-24 | 20 |
What 2020 Porsche 911 owners say
Most recent owner complaints, unedited.
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] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Both my rear break lights are showing stress cracks from movement of the frame of the body. There are other references to this happening online from other owners and it's a manufacturer defect. I brought to the dealer and was told that they should be replaced for $3000 each as they are allowing water to intrude and will cause a shorting out of the brake lights. No brake lights would be a major hazard. The cracks in both lights were not due to impacts. It is a design issue.
I am writing to express my significant frustration regarding the handling of the federal safety agency Recall 25V896. I dropped off my vehicle several weeks ago following the recall notice, only to be informed later that the software remedy is not expected until Q2 2026. It is unacceptable to request that customers surrender their vehicles for a recall when the manufacturer is not yet prepared to provide the necessary service or solution.
My 2020 porsche 911 was two days old when I get a "ignition lock error-service required". The next day the tachometer stopped working. After the dealer fixed the problem, I drove home and park the car for two days. The next day the car would not start. I was told by the dealer this car has many problems with it's computer which makes the car unsafe because lots of its functions are computer controlled. I also just received a recall no.19v‑878.
Compare the 2020 Porsche 911
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Questions about the 2020 Porsche 911
Is the 2020 Porsche 911 reliable?
Owners have filed 5 complaints about the 2020 Porsche 911, close to a typical 911 model year.
What is the most common problem with the 2020 Porsche 911?
Engine and cooling, with 3 complaints. Next is transmission (2).
How many recalls does the 2020 Porsche 911 have?
2 recalls, covering back over prevention and visibility.
What gas mileage does the 2020 Porsche 911 get?
Official estimates for the 2020 Porsche 911 range from 20 mpg combined. The most efficient version (3.0L 6-cyl, RWD) gets 17-18 city and 23-25 highway.
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