PorscheBoxster2003Overview/porsche/boxster/2003/base/

2003 Porsche Boxster

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

Body PASSENGER CARTransmission Automatic (S5)

The 2003 Porsche Boxster is a passenger-car model equipped with the Automatic (S5) transmission and EPA fuel-economy ratings of 16/24/19 mpg. Owner records show 19 total complaints, with Engine & Engine Cooling cited as the top problem area, alongside 4 recalls. Across the nameplate’s 1997–2024 production span, that complaint volume falls below the 1998 peak of 34 and above the 2008 low of 1, placing the 2003 model between those extremes and signaling a moderate level of reported issues within the lineage.

Model year201620152014201320122011201020092003

Quick specs

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

Lug nut torque96 ft-lbsOEM · verified
EPA fuel economy16/24/19 mpgEPA · 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 99610722560
Engine air filter99611013104
Fuel filter99611025301
Spark plug99917020791
Battery9A7915105
Front wiper blades99662890111
Serpentine belt99610215168 alt 99610215167
Thermostat99610612554 alt 99610632651
Cabin air filter99757121902

Full specifications

Engine, drivetrain, dimensions and economy.

Engine & drivetrain NHTSA vPIC

TransmissionAutomatic (S5)

Dimensions & weight NHTSA vPIC

Overall length170.9 in
Overall width70.1 in
Overall height50.8 in
Wheelbase95.3 in
Curb weight2811 lb
Track (front / rear)57.5 / 60.2 in
Weight distribution (front / rear)47/53

Ratings & economy EPA / vPIC

EPA city / highway / combined16 / 24 / 19 mpg
DrivetrainRear-Wheel Drive
Recommended fuelPremium Gasoline

Performance & power Independent road tests

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

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

5.3–6.0 sec0–60 mph (tested)quickest 5.30 sec — 2003 S Convertible
YearTrim / engine0–60¼ mileHPDrivetrain
2003S Convertible 3.2L F-65.30 sec13.76 sec258 hpRWD
2003S Convertible 3.2L F-65.80 sec14.40 sec258 hpRWD
2003Convertible 2.7L F-66.00 sec14.60 sec225 hpRWD
2003Convertible 2.7L F-66.00 sec14.60 sec225 hpRWD
2004S Convertible 3.2L F-65.40 sec13.80 sec258 hpRWD
2004S Convertible 3.2L F-65.50 sec14.00 sec258 hpRWD
2001S Convertible 3.2L F-65.30 sec13.90 sec250 hpRWD
2001S Convertible 3.2L F-65.39 sec13.93 sec250 hpRWD

Service quick specs OEM factory data

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

Torque lug nuts to 96 ft-lbs. The firing order is 1-5-3-6-2-4.

Chassis torques

Lug Nuts96 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 Torque18.0-22.0 ft-lbs
Spark Plug Gap0.063 in

Battery & A/C

RefrigerantR134a
Refrigerant Capacity1.87 lbs
Oil TypeND 8 oil
Oil Capacity6.59 oz

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 spark plugs every 48,000 mi.

Every 12,000 miBody Latches, Locks & Hinges (inspect) · Brake Line (inspect) · Brake Rotor (inspect) · CV Joint Boot (inspect) · Cabin Air Filter (replace) · Engine Coolant System (inspect fluid level)
Every 24,000 miClutch Pedal Assembly (inspect) · Driveshaft U-Joint (inspect) · Engine Air Filter Element (replace) · Exhaust System (Complete) (inspect) · Fuel System (inspect) · Parking Brake System (inspect)
At 40,000 miAccessory Drive Belt (inspect)
Every 48,000 miSpark Plugs (replace)
Every 60,000 miAccessory Drive Belt (inspect) · Drive Belt (replace)
At 120,000 miFinal 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 provided federal record, the 2003 model year registers 19 complaints and 4 recalls, marking a complaint increase from the 2000-2002 period where figures ranged from 5 to 13. This places 2003 at a localized peak for reported issues within the early 2000s, though still below the initial 1997-1999 launch window which saw up to 34 complaints. Technical Service Bulletins remain high at 361, mirroring the 362 recorded for 2002, indicating consistent service attention was required during this production window. The top complaint areas are Engine & Engine Cooling with 4 reports and Power Train with 3, alongside 3 crash complaints, though the data does not specify the root causes for these failures. Following 2003, complaint numbers drop to 3 in 2004, and although 2005 matches the 2003 volume, the long-term trend moves toward single digits. Buyers should approach this model year with caution, as it exhibits higher complaint volume and sustained recall activity compared to the immediately preceding years.

4
Open recalls
NHTSA campaigns
361
Service bulletins
Manufacturer communications
0
ODI investigations
Office of Defects Investigation
19
Owner complaints
3 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

Owner complaints filed with NHTSA, by component

All 19 complaints on record, top 8 components.

Engine & Engine Cooling4
Power Train3
Steering2
Visibility/Wiper1
Tires1
Engine1
Structure,Tires1
Fuel/Propulsion System1

Source: NHTSA Office of Defects Investigation complaint database.

Recalls NHTSA · verified

Showing 2 of 4 campaigns on record for this vehicle.

09E012000Exterior LightingReported 07/04/2009

SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE… Remedy: SABERSPORT WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE SAFETY RECALL BEGAN ON MAY 11, 2009. OWNERS MAY CONTACT SABERSPORT AT…

09E025000Exterior Lighting:HeadlightsReported 11/05/2009

DOPE, INC. IS RECALLING 42,540 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE… Remedy: DOPE, INC. WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE SAFETY RECALL BEGAN ON JULY 28, 2009. OWNERS MAY CONTACT DOPE, INC. AT…

Technical service bulletins NHTSA · verified

Showing 5 of 361 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 Boxster. 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.

Reference guides

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

Frequently asked

Does the 2003 Boxster have open recalls?

NHTSA lists 4 recall campaign(s) for this model year. Check your specific vehicle by VIN.

What gas mileage does the Boxster get?

EPA figures are 16 city / 24 highway / 19 combined mpg.