🏷️ Basic Information

Make:

BMW

Model:

Z4 Convertible

Generation:

E85/E86

Model Years Covered:

2003-2008

Market Focus:

USA/Canada

👋 Introduction

Market Position:

Targeted towards BMW Z4 owners and independent repair shops specializing in European vehicles seeking precise part identification and cost estimation for repairs.

Competitive Analysis:

Competes with factory service manuals and other parts catalogs, offering a specific focus on parts sourcing and cost estimation rather than diagnostic or repair procedures.

Key Features:

Provides genuine OEM part numbers, detailed exploded view diagrams for part identification, and estimated labor times to facilitate accurate repair quotes and parts ordering.

📋 Manual Details

Manual Type:

Parts Catalog

Language:

English

Format:

Digital (implied, typically sold as PDF or searchable database)

Data Source:

Original Repair Shop Estimating Catalog

Content Type:

Genuine Manufacturer Part Numbers, Diagrams, Approximate Prices, Estimated Labor Times

📖 Manual Coverage

Systems Covered:

Air Conditioning, Heater, Ventilation, Air Bags, Body Panels (Bumpers, Doors, Fenders, Hood, Roof), Brakes, ABS, Convertible Top, Cooling System (Radiator, Water Pump, Hoses), Dashboard, Instrument Panel, Console, Electrical Components (Alternator, Battery, Starter, Ignition, Lights, Cruise Control, Horn, Wipers), Emission System, Exhaust System, Engine Accessories (Oil Pan, Belts, Pulleys, Mounts, Accessories), Frame, Fuel System, Interior Trim, Locks, Moldings, Trim, Paint Codes, Seats, Seat Belts, Sunroof, Suspension, Steering, Transmission Mounts, Wheels, Windows, Glass

Systems Not Covered:

Service/Repair Information, Wiring Diagrams, Electrical Harnesses (except some switches), Engine Internal Parts (Cylinder Head, Engine Block, etc.), Transmission Internals, Clutch

Technical Depth:

Parts identification and replacement cost estimation; does not include procedural repair instructions.

📊 Manual Specifications

File Format:

Likely PDF or proprietary database format

Print Quality:

N/A (digital format)

Binding Type:

N/A (digital format)

Paper Type:

N/A (digital format)

⚙️ Engine Specifications

Primary Engine Options:

The 2003-2008 BMW Z4 (E85/E86) was offered with several inline-six engines: the 3.0L (M54B30) and later the 3.0L N52B30, and the 2.5L (M54B25) and later the 2.5L N52B25. The higher performance Z4 M models featured the 3.2L S54B32 inline-six.

Typical Horsepower Range:

Approximately 189 hp (2.5L) to 330 hp (Z4 M) depending on engine variant.

Typical Torque Range:

Approximately 200 lb-ft (2.5L) to 262 lb-ft (Z4 M) depending on engine variant.

Fuel System:

Fuel Injection

Engine Block Material:

Aluminum (N52), Cast Iron (M54)

Cylinder Head Material:

Aluminum

🔧 Transmission

Standard Transmission:

6-speed Manual

Optional Transmission:

6-speed Automatic (Steptronic)

Transmission Mounts Covered:

Yes, the manual covers part numbers and diagrams for transmission mounts.

Gear Ratios:

Specific gear ratios are not detailed in this parts catalog, but component part numbers for the gearbox will be listed.

📐 Dimensions

Body Styles:

Roadster (E85) and Coupe (E86)

Length:

Approximately 167.4 inches (Roadster), 168.6 inches (Coupe)

Width:

Approximately 68.7 inches

Height:

Approximately 53.1 inches (Roadster), 51.2 inches (Coupe)

Curb Weight:

Approximately 3,000 - 3,300 lbs, depending on engine and options.

🛡️ Safety Features

NHTSA Ratings:

Specific NHTSA ratings for this generation are not readily available, but generally, BMWs of this era performed well in safety tests.

Passive Safety Features:

Front airbags, side airbags, roll-over protection system (integrated into A-pillars and rear headrests/safety bar deployment).

Active Safety Features:

Anti-lock Braking System (ABS), Dynamic Stability Control (DSC), Traction Control (ASC+T)

Convertible Top Safety:

The manual covers parts for the power-operated convertible top mechanism and includes information related to the integrated roll-over protection.

💡 Technology Features

Infotainment System:

BMW iDrive system was available as an option on later models, featuring a central display screen and controller for navigation, audio, and climate control.

Driver Assistance Features:

Optional features included Park Distance Control (PDC) and xenon headlights.

Connectivity Features:

Bluetooth integration for hands-free calling was available on select models and trims.

🔧 Maintenance

Typical Oil Change Interval:

BMW's 'Condition Based Service' system typically recommends oil changes based on driving conditions, often around 10,000-15,000 miles or annually. Specific BMW part numbers for oil filters and recommended oil types are crucial.

Engine Oil Specification:

API SN or BMW LL-01 approved synthetic oil, typically 5W-30 or 0W-40 depending on climate and engine variant. (Consult specific vehicle documentation for exact requirements).

Coolant Specification:

BMW Blue or Pentosin antifreeze/coolant, typically a 50/50 mixture with distilled water. (BMW P/N: 82140031198 or equivalent).

Brake Fluid Specification:

DOT 4 or DOT 4 LV brake fluid. (BMW P/N: 83190A10227 or equivalent).

Common Issues:

Some common issues can include VANOS solenoid failures, oil leaks from valve cover gaskets or oil filter housings, and potential issues with the power convertible top hydraulic system. Suspension bushings and control arms are also wear items.

Oil Filter Part Number Example:

Mann-Filter HU830Z or Mahle OX167/1de are common equivalents for the M54 engines. (Actual BMW P/N: 11421742973).

Cabin Air Filter Part Number Example:

Mann-Filter CU2359 or Mahle LAK266 are common equivalents. (Actual BMW P/N: 64316903662).

📚 Vehicle History

Brand Heritage:

BMW has a long-standing reputation for producing driver-focused sports cars, tracing its lineage back to models like the BMW 507 and the original Z1 and Z3 roadsters.

Model Evolution:

The Z4 (E85/E86) succeeded the Z3, introducing a more modern design language, improved handling dynamics, and a more sophisticated interior. It was BMW's primary two-seater roadster offering during its production run.

Production Locations:

Primarily manufactured in the United States at BMW's Spartanburg, South Carolina plant.

🏆 Awards & Recognition

Automotive Awards:

While specific awards for the 2003-2008 Z4 might vary, BMW vehicles of this era were consistently recognized for their driving dynamics, performance, and build quality by automotive publications like Car and Driver and MotorTrend.