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2021 Porsche 911

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2021 911.

Transmission Automatic (AM-S8)

Equipped with an AM-S8 eight-speed automatic transmission, the 2021 Porsche 911 achieves EPA fuel economy figures of 18 mpg city, 24 mpg highway, and 20 mpg combined. Although the model carries seven recalls and five owner complaints primarily concentrated in the fuel and propulsion system, this volume is minimal within the broader trajectory of the nameplate's reliability history. Compared to historical complaint data spanning 1990 to 2014, the 2021 model's few issues sit far closer to the record low of a single complaint in 1991 than the peak of 50 complaints in 2007, indicating a highly reliable entry for the model.

Model year2026 2025 2024 2023 2022 2021 2020 2019 2018

Quick specs

Fluid capacities, tune-up values and fuel economy at a glance.

EPA fuel economy18/24/20 mpgEPA · verified

Fitment & sizes

Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.

From the factory this vehicle uses a BCI The OEM uses various batteries during production based on vehicle options. PR codes will denote factory installed options for this vehicle. Refer to the appropriate service information for options and battery usage. battery, OE oil filter 9A711549900. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.

Battery groupBCI The OEM uses various batteries during production based on vehicle options. PR codes will denote factory installed options for this vehicle. Refer to the appropriate service information for options and battery usage.OEM · verified

Tire size235/40ZR19 (92Y), Rear: 295/35ZR20 (101Y)OEM · verified

Wheel / rim8.5, Rear: 11.5 inOEM · verified

OE service part numbers OEM · verified

Engine oil filter	9A711549900 alt 0PB115427
Engine air filter	992129620 alt 992129620A
Spark plug	9A790560150 alt 0PB905612
Battery	9Y0915107NY alt 992915105A
Front wiper blades	992955425BY
Serpentine belt	0PB903137A alt 0PB903137C
Thermostat	0PB121110A alt 0PB121688
Cabin air filter	9P1819631 alt 992819429

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

Transmission

Automatic (AM-S8)

Dimensions & weight NHTSA vPIC

Overall length	178 in
Overall width	72.8 in
Overall height	51.2 in
Wheelbase	96.5 in
Curb weight	3472 lb
Track (front / rear)	62.6 / 61.4 in
Weight distribution (front / rear)	39/61

Ratings & economy EPA / vPIC

EPA city / highway / combined	18 / 24 / 20 mpg
Drivetrain	Rear-Wheel Drive
Recommended fuel	Premium Gasoline

Performance & power Independent road tests

0–60 mph, quarter-mile, horsepower and torque from independent road tests.

Independent road tests for the 911 of this era, listed by trim and engine — this page spans more than one engine, so no single horsepower figure is shown.

2.1–4.0 sec0–60 mph (tested)quickest 2.10 sec — 2021 Turbo S Lightweight Package Coupe

Year	Trim / engine	0–60	¼ mile	HP	Drivetrain
2021	Turbo S Lightweight Package Coupe 3.7L Twin-Turbo F-6	2.10 sec	9.90 sec	640 hp	AWD
2021	Turbo S Lightweight Package Coupe 3.7L Twin-Turbo F-6	2.10 sec	9.90 sec	640 hp	AWD
2021	Turbo S Coupe 3.7L Twin-Turbo F-6	2.20 sec	10.10 sec	640 hp	AWD
2021	Turbo S Lightweight Package Coupe 3.7L Twin-Turbo F-6	2.20 sec	10.00 sec	640 hp	AWD
2021	Turbo S Cabriolet 3.7L Twin-Turbo F-6	2.30 sec	10.20 sec	640 hp	AWD
2021	Turbo S Coupe 3.7L Twin-Turbo F-6	2.30 sec	10.30 sec	640 hp	AWD
2021	Turbo Coupe 3.7L Twin-Turbo F-6	2.40 sec	10.30 sec	572 hp	AWD
2021	Turbo S Cabriolet 3.7L Twin-Turbo F-6	2.40 sec	10.40 sec	640 hp	AWD

Service quick specs OEM factory data

Capacities, torques and tune-up values from the factory service manual.

Engine torques

Oil Pump to Cylinder BLock Bolts/Studs

114.0 inch lbs. ft-lbs

Multi-step torque procedures OEM · verified

Camshaft Bearing/Carrier Cap Bolts or Studs — tightening sequence 1 stages

42.0 inch lbs., Step 2: 50°

42 in

Connecting Rod (Large End) Bearings — tightening sequence 1 stages

42.0 inch lbs., Step 2: 144.0 inch lbs., Step 3: 80°, Step 4: Loosen all Bolts, Step 5: 42.0 inch lbs., Step 6: 144.0 inch lbs., Step 7: 80°

42 in

Engine Flywheel Bolts — tightening sequence 1 stages

19.0 ft. lbs., Step 2: 120°

19 ft. lbs

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 10,000 mi; spark plugs every 30,000 mi.

Every 10,000 mi	Brake Line (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace) · Tire & Wheel Assembly (inspect) · Underbody (inspect) · Underbody Splash Shield (inspect)
Every 20,000 mi	Active Suspension System (inspect fluid level) · Air Intake Duct (inspect) · Body Water Drains (inspect) · Brake Rotor (inspect) · Brake System (inspect) · CV Joint Boot (inspect)
Every 30,000 mi	Spark Plugs (replace)
Every 40,000 mi	Accessory Drive Belt (inspect) · Body Latches, Locks & Hinges (inspect) · Brake Linings (inspect) · Engine Air Filter Element (replace) · Exhaust System (Complete) (inspect) · Fuel Line (inspect)
Every 60,000 mi	Clutch Hydraulic System (drain & refill) · Drive Belt (replace)
Every 80,000 mi	Engine Mount (inspect) · Transfer Case Assembly (drain & refill)
At 120,000 mi	Drive Axle Assembly (drain & refill) · Transmission Assembly (drain & refill)

Reliability & federal safety record

Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.

The 2021 Porsche 911 sits in a generation that follows a notable spike in complaints seen in 2007 (50 complaints) and a subsequent drop to just 2 in 2014. For the 2021 model year, the federal record shows only 5 total complaints across three areas—led by the fuel/propulsion system (3)—and a single fire complaint, with no crash complaints reported. This is a low figure compared to the 2007 peak, though it is slightly higher than the 2014 baseline. Because the data does not include recall counts for 2021, and the complaint total is modest, the 2021 appears to be a relatively trouble-free year within the broader arc of the 911’s history. **Bottom line: Based solely on the available federal record, the 2021 Porsche 911 is a good year to buy, showing few complaints and no crash issues.**

Open recalls

NHTSA campaigns

657

Service bulletins

Manufacturer communications

ODI investigations

Office of Defects Investigation

Owner complaints

0 involved a crash · 1 a fire

NHTSA crash-test rating federal NCAP · out of 5 stars

Overall★★★★★

Frontal★★★★★

Side★★★★★

Rollover★★★★★

Owner complaints by model year NHTSA · this generation & adjacent

’90 ’91 ’92 ’93 ’94 ’95 ’96 ’97 ’98 ’99 ’00 ’01 ’07 ’14

Owner complaints filed with NHTSA, by component

All 5 complaints on record, top 3 components.

Fuel/Propulsion System3

Equipment Adaptive/Mobility1

Seats1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 1 of 1 campaigns on record for this vehicle.

21V697000Service Brakes, Hydraulic:Foundation ComponentsReported 08/09/2021

Porsche Cars North America, Inc. (Porsche) is recalling certain 2020-2021 911 Carrera and Taycan vehicles. The pressure input rod connection on the brake booster may be loose and could detach. Remedy: Dealers will repair or replace the brake booster as necessary, free of charge. Owner notification letters were mailed October 28, 2021. Owners may contact Porsche customer service…

Technical service bulletins NHTSA · verified

Showing 5 of 657 bulletins on record with NHTSA.

Bulletin	Date	Component	Summary
03/26 9102	2026-06-30	Electrical System	Complaint Regarding the Camera View (Real Top View) in the PCM Central Display (03/26)
40/26 4407	2026-06-30	Wheels	Wheel Bolt Replacement Requirement - Change from Wheel Bolts with Aluminum Washers to…
TSTR2636	2026-06-29	Unknown Or Other	Porsche Tester Software Update Information Software Version: 44.200.031
TSTR2635	2026-06-29	Unknown Or Other	Porsche Tester Software Update Information Software Version: 44.200.030
20/26	2026-06-25	Engine	Overview of Approved Porsche C20 Engine Oils (20/26)

Common OBD-II trouble codes

The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.

P0420

Catalyst system efficiency below threshold — Bank 1

P0300

Random / multiple cylinder misfire detected

P0171

System too lean — Bank 1

P0455

Evaporative emission system leak detected — large leak

P0128

Coolant thermostat below regulating temperature

P0442

Evaporative emission system leak detected — small leak

VIN tools

Decode factory build data for a specific vehicle by VIN.

VIN

Decode a VIN to confirm the transmission and build data for a specific 911. OEM

Build data

Plant, GVWR class, engine and body data for any 17-character VIN.

Recalls

Check open recall campaigns against a specific vehicle by VIN.

Vehicles with shared specs

Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.

Group T battery Engine oil filter 9A711549900 Engine air filter 992129620 Spark plug 9A790560150 Battery 9Y0915107NY

Reference guides

Cross-vehicle references for the kinds of data on this page.

Vehicle recalls & TSBs OBD-II trouble codes Torque specifications Maintenance schedules Fluid capacities & specs

Frequently asked

Does the 2021 911 have open recalls?

NHTSA lists 7 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the 911 get?

EPA figures are 18 city / 24 highway / 20 combined mpg.