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2003 Porsche 911

Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 911.

Body PASSENGER CAR

The 2003 Porsche 911, a passenger car built on the model’s iconic platform, carries forward the lineage of a sports coupe that has defined the line for decades. In its model‑year record it logged 14 total owner complaints, two recalls, and ranks near the lower end of the complaint curve that spans from the single complaint of 1991 to the 50 complaints of 2007. This places the 2003 iteration among the more reliable years in the 911’s long‑term ownership history.

Model year202620252024202320222021202020192003

Quick specs

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

Lug nut torque96 ft-lbsOEM · verified

Fitment & sizes

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

From the factory this vehicle uses OE oil filter 0PB115499A. 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.

OE service part numbers OEM · verified

Engine oil filter0PB115499A alt 99610722553
Engine air filter99611013152 alt 99611013171
Fuel filter99611025352
Spark plug99917020791 alt 99917019590
Battery9A7915089G alt 9A7915105
Front wiper blades99662890111
Serpentine belt99610215167 alt 99610215168
Thermostat99610612554 alt 99610612573
Cabin air filter99757121902

Full specifications

Engine, drivetrain, dimensions and economy.

Dimensions & weight NHTSA vPIC

Overall length174.4 in
Overall width69.7 in
Overall height51.6 in
Wheelbase92.5 in
Curb weight3274 lb
Track (front / rear)57.9 / 61 in

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.

4.6–5.0 sec0–60 mph (tested)quickest 4.60 sec — 2003 Carrera 4S Coupe
YearTrim / engine0–60¼ mileHPDrivetrain
2003Carrera 4S Coupe 3.6L F-64.60 sec13.10 sec320 hpAWD
2003Carrera 4S Coupe 3.6L F-64.60 sec12.90 sec320 hpAWD
2003Carrera Cabriolet 3.6L F-65.00 sec13.40 sec320 hpRWD
2002GT2 Coupe 3.6L Twin-Turbo F-63.60 sec11.90 sec456 hpRWD
2002GT2 Coupe 3.6L Twin-Turbo F-63.80 sec12.00 sec456 hpRWD
2002GT2 Coupe 3.6L Twin-Turbo F-63.90 sec12.10 sec456 hpRWD
2002GT2 Coupe 3.6L Twin-Turbo F-63.90 sec12.40 sec456 hpRWD
2002Carrera Coupe 3.6L F-64.90 sec13.40 sec320 hpRWD

Service quick specs OEM factory data

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

This engine 75W-90 · GL-5 in the differential. Torque lug nuts to 96 ft-lbs, the oil drain plug to 37.0 ft-lbs. The firing order is 1-5-3-6-2-4.

Lubricants & capacities

Differential Gear Oil75W-90 · GL-5
Differential Gear Oil Capacity2 Pints

Engine torques

Engine Oil Pan Drain Plug37.0 ft-lbs

Chassis torques

Lug Nuts96 ft-lbs
Transfer Case Fill Plug21.0-22.0 ft-lbs
Transfer Case Drain Plug21.0-22.0 ft-lbs

Ignition

Cylinder Firing Order1-6-2-4-3-5
Cylinder Firing Order1-5-3-6-2-4
Spark Plug Gap0.028 in
Spark Plug Torque16.0-22.0 ft-lbs

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.93-2.00 lbs
Oil GroupPAG
Oil TypeND 8 oil
Oil Capacity6.58 oz
RefrigerantR134a
Refrigerant Capacity2.00 lbs
Oil GroupPAG

Brakes

Minimum Pad ThicknessFront: 0.079; Rear: 0.079 in
Minimum Shoe Thickness0.079 in

Factory maintenance schedule OEM · verified

Normal service, condensed from the factory interval matrix.

Under the factory schedule, replace the engine oil and filter every 15,000 mi; spark plugs every 60,000 mi; coolant every 15,000 mi. The big-interval services (every 15,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.

At 15,000 miCabin Air Filter (replace) · Headlamp (inspect alignment) · Headlamp Washer System (inspect fluid level) · Power Steering System (inspect) · Tire & Wheel Assembly (inspect) · Underbody (inspect)
Every 15,000 miBody Lock Cylinders (lubricate) · Cruise Control System (inspect) · Engine Coolant System (leak inspection) · Engine Coolant System Hoses (inspect) · Engine Oil (drain & refill) · Engine Oil Filter (replace)
Every 30,000 miCabin Air Filter (replace) · Engine Air Filter Element (replace) · Exhaust System (Complete) (inspect) · Headlamp (inspect alignment) · Headlamp Washer System (inspect fluid level) · Parking Brake System (inspect)
Every 60,000 miAccessory Drive Belt (inspect) · Fuel Filter (replace) · Spark Plugs (replace)
Every 90,000 miDrive Axle Assembly (drain & refill) · Final Drive (drain & refill) · Transmission Assembly (drain & refill) · Transmission Fluid & Filter (replace)

Reliability & federal safety record

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

In the 2003 Porsche 911, the federal record shows 12 complaints, 0 recalls, 2 investigations, and 116 TSBs, a spike compared with the previous year’s 5 complaints and 1 recall in 2000 and the following year’s 8 complaints in 2001. This places 2003 at the peak of complaint activity for the generation, while recall activity remained low across the decade, indicating that most issues were addressed through investigations and technical service bulletins rather than mass recalls. The top complaint categories for 2003—“Unknown Or Other,” “Engine & Engine Cooling,” and “Seats”—each involved three complaints, with no recorded crash or fire complaints that year. The trend shows a gradual rise in complaints through the early 2000s, peaking in 2003, then declining thereafter. Given the higher complaint volume and the lack of recalls, a 2003 model warrants a thorough pre‑purchase inspection, but it is still a viable year if those specific issues are resolved.

2
Open recalls
NHTSA campaigns
366
Service bulletins
Manufacturer communications
1
ODI investigations
Office of Defects Investigation
14
Owner complaints
0 involved a crash · 0 a fire
NHTSA crash-test rating federal NCAP · out of 5 stars
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 14 complaints on record, top 8 components.

Unknown Or Other3
Engine & Engine Cooling3
Seats3
Engine1
Engine & Engine Cooling,Electrical System,Wheels1
Tires1
Equipment1
Seat Belts1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

No recall campaigns on record with NHTSA for this vehicle as of the last data refresh.

Technical service bulletins NHTSA · verified

Showing 5 of 366 bulletins on record with NHTSA.

BulletinDateComponentSummary
40/26 44072026-06-30WheelsWheel Bolt Replacement Requirement - Change from Wheel Bolts with Aluminum Washers to…
TSTR26362026-06-29Unknown Or OtherPorsche Tester Software Update Information Software Version: 44.200.031
TSTR26352026-06-29Unknown Or OtherPorsche Tester Software Update Information Software Version: 44.200.030
20/262026-06-25EngineOverview of Approved Porsche C20 Engine Oils (20/26)
19/26 17012026-06-25EngineOverview of Approved Porsche C30 Engine Oils (19/26)

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.

Engine oil filter 0PB115499AEngine air filter 99611013152Fuel filter 99611025352Spark plug 99917020791

Reference guides

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

Vehicle recalls & TSBsOBD-II trouble codesMaintenance schedulesFluid capacities & specs

Frequently asked

Does the 2003 911 have open recalls?

NHTSA lists 2 recall campaign(s) for this model year. Check your specific vehicle by VIN.