2021 Porsche 911 Problems: 9 Known Issues
2021 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026
2021 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
2021 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026
2021 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Porsche 911 has 9 documented known issues, with 2 rated critical. The most serious are Windshield and Rear Window Bonding Failure (Recall 24V-155 / ARA3) ($0-$0 repair) and Center-Lock Wheel Bolt Fracture on Center-Lock-Equipped 992 Models (Recall 24V-809 / ARC4) ($0-$0 repair). Across all issues with published estimates, repair costs range from $150 to $4,000. DIY maintenance guides at au7o.io.
EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE
Porsche Cars North America, Inc. (Porsche) is recalling certain 2025 911 vehicles. A software error in the front-end electronics control module may result in the low beam headlights creating a glare for oncoming traffic. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
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."
VISIBILITY:WINDSHIELD
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.
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According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Porsche 911 has 9 documented issues. The most frequently reported are: Windshield and Rear Window Bonding Failure (Recall 24V-155 / ARA3), Center-Lock Wheel Bolt Fracture on Center-Lock-Equipped 992 Models (Recall 24V-809 / ARC4), GT3 4.0L Oil Tank Threaded Insert Separates When the Drain Plug Is Loosened. Of these, 2 are rated critical and should be addressed promptly.
The 2021 Porsche 911 has 9 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: Windshield and Rear Window Bonding Failure (Recall 24V-155 / ARA3) and Center-Lock Wheel Bolt Fracture on Center-Lock-Equipped 992 Models (Recall 24V-809 / ARC4). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Porsche 911 issues range from $0 to $4,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Windshield and Rear Window Bonding Failure (Recall 24V-155 / ARA3), typically costs $0-$0 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
Porsche's Part 573 report for recall 24V-155 states that on affected 992-generation 911s "the front and rear windows were not manufactured in accordance with the specifications and therefore not bonded sufficiently to the body." The root cause was a supplier cleaning-process erro… Repairs typically run $0-$0. Severity: high.
NHTSA recall 24V-809 covers 2021-2024 Porsche 911s (alongside 2024 718 Cayman GT4 RS and Spyder RS and the 2025 Panamera) in which "the center lock wheel bolt may fracture and cause the wheel to detach." A batch of center-lock nuts was manufactured out of specification. This is s… Repairs typically run $0-$0. Severity: high.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
WHEELS:LUGS/NUTS/BOLTS/STUDS
Porsche Cars North America, Inc. (Porsche) is recalling certain 2025 Panamera, 2024 718 Cayman GT4 RS, 718 Spyder RS, and 2021-2024 911 vehicles. The center lock wheel bolt may fracture and cause the wheel to detach.
SEAT BELTS: REAR/OTHER:BUCKLE ASSEMBLY
Porsche Cars North America, Inc. (Porsche) is recalling certain 2023 911 vehicles. The bolts for the rear seat belt buckles may not be tightened properly.
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Porsche Technical Information 96/22 ENU 1752 applies specifically to the 911 GT3 (992) and 911 GT3 with Touring Package (992), model years 2021 through 2022. On cars built before 27 January 2022 (engine number DRM 004177), "it is possible for the threaded insert, into which the o… Repairs typically run $150-$3,500. Severity: medium.
Porsche Technical Information 88/20 ENU 3734, "Complaint - Oil Leaks on Double Clutch Transmission (Porsche Doppelkupplung PDK)," covers the 911 Carrera (992) from model year 2020 with the 8-speed automatic transmission (I-no. G1F) and the 8-speed all-wheel-drive transmission (I-… Repairs typically run $400-$4,000. Severity: medium.
Porsche Technical Information 31/20 ENU 2706, "Diagnosis and Handling of 12-Volt Lithium-Ion Battery (On-Board Battery)," covers the 911 Carrera (992) alongside the Cayenne and Taycan and applies to cars fitted with the lightweight lithium battery (I-no. J2A). Porsche wrote the b… Repairs typically run $0-$1,800. Severity: medium.
Porsche Technical Information 177/20 ENU 9125 applies to the 911 Carrera (992) from model year 2020 and concerns the Connect control unit (external communication control unit). Porsche's symptom description is precise: with the Porsche Vehicle Tracking System (PVTS) activated, "a… Repairs typically run $0-$400. Severity: medium.
Porsche Advanced Technical Information bulletin 2118.1 (Part ID 1750), "992-Upper Oil Pan Seal Housing Leak," covers 911 (992) vehicles up to model year 2021. The complaint is an oil leak from the rear engine area with no relevant fault codes stored, and the bulletin notes the le… Repairs typically run $600-$2,200. Severity: medium.
Porsche Technical Information 213/21 ENU 4316 applies to the 911 (992) for model years 2021 through 2022. The yellow warning message "Chassis system fault" is displayed in the instrument cluster and one or more of the following entries are stored in the PASM control unit: C10B804… Repairs typically run $0-$350. Severity: medium.
Porsche Technical Information 40/21 ENU 4381 covers 911 Carrera (992) cars from model year 2020 fitted with the front-axle lift function (M-no. 2UH). The white warning message "Lift system fault - Service necessary" appears in the instrument cluster and the entry "C1365F8 - Measu… Repairs typically run $200-$3,000. Severity: low.