Factory maintenance schedule OEM · verified
Normal service, condensed from the factory interval matrix.
Under the factory schedule, replace the spark plugs every 100,000 mi.
| Every 100,000 mi | Oxygen Sensor (replace) · Spark Plugs (replace) |
Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2003 COOPER - Convertible R52.
The 2003 Mini Cooper Convertible, built on the R52 platform as a passenger car, pairs its R52 engine with an automatic transmission featuring variable gear ratios, delivering EPA-rated fuel economy of 22 city, 29 highway, and 25 combined mpg. With an oil capacity of 4.8 quarts of 5W-30 viscosity, this model year’s reliability record is defined by 537 owner complaints—steering being the most frequent issue—and four recalls, placing it as a notably troubled entry in the Convertible’s history.
Fluid capacities, tune-up values and fuel economy at a glance.
Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.
From the factory this vehicle uses a BCI 47 · 480 CCA battery, OE oil filter 11427562249. 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.
| Engine oil filter | 11427562249 alt 11421486687 |
| Engine air filter | 13717558382 alt 13721477840 |
| Fuel filter | 16146757196 alt 16146765124 |
| Battery | 61218377139 |
| Front wiper blades | 61610028137 |
| Thermostat | 11537596787 alt 11537512733 |
| Cabin air filter | 64319257505 |
Engine, drivetrain, dimensions and economy.
| Transmission | Automatic (variable gear ratios) |
| Overall length | 142.9 in |
| Overall width | 66.5 in |
| Overall height | 55.9 in |
| Wheelbase | 97.2 in |
| Curb weight | 2524 lb |
| Track (front / rear) | 57.9 / 57.5 in |
| Weight distribution (front / rear) | 61/39 |
| EPA city / highway / combined | 22 / 29 / 25 mpg |
| Drivetrain | Front-Wheel Drive |
| Recommended fuel | Premium Gasoline |
Capacities, torques and tune-up values from the factory service manual.
This engine holds 4.8 qt of 5W-30 engine oil. Torque lug nuts to 88 ft-lbs, the oil drain plug to 23.0 ft-lbs. The firing order is 1-3-4-2.
| Engine Oil | SYNTHETIC · 5W-30 |
| Engine Oil Capacity | 4.8 qt |
| Engine Oil | SYNTHETIC · 5W-30 |
| Engine Oil Capacity | 5.1 qt |
| Power Steering Fluid | USE BMW PART NO. 82110148132 PENTOSIN CHF11S |
| Camshaft Bearing/Carrier Cap Bolts or Studs | 22 ft-lbs |
| Crankshaft Pulley and/or Damper Bolts | 85 ft-lbs |
| Intake Manifold to Engine Bolts | 19 ft-lbs |
| Exhaust Manifold to Cylinder Head Bolts | 36 ft-lbs |
| Engine Oil Pan Drain Plug | 23.0 ft-lbs |
| Oil Pump to Cylinder BLock Bolts/Studs | 13 ft-lbs |
| Lug Nuts | 88 ft-lbs |
| Front Wheel Hub | 134 ft-lbs |
| Cylinder Firing Order | 1-3-4-2 |
| Curb Idle Speed (No Load) | 750 rpm |
| Curb Idle Speed (Secondary Under Load) | 750 rpm |
| Spark Plug Manufacturer | BMW |
| Spark Plug Gap | Not adjustable in |
| Spark Plug Torque | 16.0 ft-lbs |
| Refrigerant | R134a |
| Refrigerant Capacity | 0.89-1.00 lbs |
| Standard BCI Group Number | 47 |
| Standard BCI Cranking Performance | 480 cca |
| Pressure Test | ----- psi |
| Radiator Cap Pressure Relief | ------ psi |
| Thermostat Opening Temperature | ------- °F |
| Engine Compression | 138-196 psi |
| Engine Oil Pressure | 3.63 |
| Torque Caliper to Bracket | 81 ft-lbs / 18-22 ft-lbs |
| Torque to Knuckle | 81-96 ft-lbs / 48 ft-lbs |
| Minimum Pad Thickness | Front: 0.118; Rear: 0.0118 in |
| Rotor Minimum Machining | 0.031 in |
| Rotor Discard at or Under | 0.748 in / 0.276 in |
| 1 | 4 ft. lbs., Step 2: 7 ft. lbs., Step 3: 130 | 4 ft. lbs |
| 1 | 6 ft. lbs., Step 2: 22 ft. lbs., Step 3: 90 | 6 ft. lbs |
| 1 | 22 ft. lbs., Step 2: 150 | 22 ft. lbs |
Normal service, condensed from the factory interval matrix.
Under the factory schedule, replace the spark plugs every 100,000 mi.
| Every 100,000 mi | Oxygen Sensor (replace) · Spark Plugs (replace) |
Owner-reported issues, recalls, investigations and service bulletins on record with NHTSA — an unfiltered look at what owners actually experience.
Owner complaints about the 2003 Mini COOPER - Convertible dominate in one area — the steering, 254 of 537 reports (47%), well ahead of the next concern. That matters, because the steering are also the target of recall 15V-660 on this vehicle — so the single most useful check before buying or servicing one is confirming it was actually performed. 14 of the reports describe a crash and 48 a fire — a small share of the total, but worth weighing against the steering pattern above. These are tallies of what owners actually reported to the federal government, not an editorial score — and higher-selling models naturally rack up more reports.
All 537 complaints on record, top 8 components.
Source: NHTSA Office of Defects Investigation complaint database.
Showing 2 of 4 campaigns on record for this vehicle.
BMW of North America, LLC (BMW) is recalling certain model year 2002-2005 MINI Cooper and Cooper S vehicles and 2005 Cooper and Cooper S Convertible vehicles. The affected vehicles may experience temporary or permanent… Remedy: MINI will notify owners, and dealers will inspect the electro-hydraulic power steering system, replacing the components and wiring, as necessary, free of charge. Interim notices…
K2 MOTOR IS RECALLING 1,921 AFTERMARKET HEADLAMPS OF VARIOUS MODELS SOLD FOR USE ON THE ABOVE LISTED VEHICLES. THESE HEADLAMPS ARE MISSING THE AMBER SIDE REFLEX REFLECTOR WHICH FAILS TO CONFORM WITH THE REQUIREMENTS OF… Remedy: K2 MOTOR WILL NOTIFY OWNERS AND OFFER A FULL REFUND. THE RECALL BEGAN ON DECEMEBER 17, 2008. OWNERS MAY CONTACT K2 MOTOR AT 1-909-839-2992.
Showing 5 of 56 bulletins on record with NHTSA.
| Bulletin | Date | Component | Summary |
|---|---|---|---|
| M511616 | 2023-11-02 | Structure | Cavity protection applied to underside of the hood is leaking out onto the wheel arch… |
| M240112 | 2019-07-12 | Electrical System | Programming a Replacement EGS Module with ISTA/P. Programming a replacement electronic… |
| M650610 | 2018-06-01 | Equipment | NAVIGATION SYSTEM HAS MISSING OR INCORRECT ROAD MAP DATA: The route guidance is… |
| M650610 | 2018-05-01 | Equipment | NAVIGATION SYSTEM HAS MISSING OR INCORRECT ROAD MAP DATA: The route guidance is… |
| M120817 | 2018-05-01 | Engine And Engine Cooling | W10 ENGINE: EMS2K - COMPREHENSIVE COMPONENT OBD READINESS MONITOR NOT COMPLETED: An… |
The most common OBD-II codes for this vehicle's emissions system. These are standardized SAE J2012 definitions, not vehicle-specific fault reports.
Decode factory build data for a specific vehicle by VIN.
Find every vehicle that shares this one's battery, bulbs, oil capacity, platform or parts.
Cross-vehicle references for the kinds of data on this page.
4.8 qt of USE MINI SYNTHETIC 5W-30 MOTOR OIL, per the factory manual.
NHTSA lists 4 recall campaign(s) for this model year. Check your specific vehicle by VIN.
EPA figures are 22 city / 29 highway / 25 combined mpg.