🏷️ Basic Information

Make:

BMW

Model:

Z4

Generation:

E85 (Roadster) / E86 (Coupé)

Model Year:

2008

Chassis Codes:

E85, E86

👋 Introduction

Positioning:

Premium sportscar, targeting driving enthusiasts

Competitors:

Porsche Boxster, Mercedes-Benz SLK, Audi TT

Design Philosophy:

Classic two-seater roadster proportions, driver-focused cockpit

Manual Advantage:

Provides exact dealership-level information for accurate and efficient repairs

📋 Manual Details

Scope:

All models and all repairs A-Z

Target Audience:

Professional technicians and DIY enthusiasts

Estimated Pages:

Likely extensive, typical for factory service manuals (precise number not provided, but implied by comprehensive coverage)

Type:

Factory Service and Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine:

Full service, diagnosis, repair, specifications, maintenance

Control System:

Engine control systems, electronic diagnostics

Mechanical:

Comprehensive mechanical systems repair

Fuel System:

Service specifications, fuel delivery, injection

Emission Control:

Diagnosis, repair, and specifications for emission control systems

Cooling System:

Cooling system service, diagnosis, and repair

Lubrication System:

Lubrication service, specifications, and diagnosis

Ignition Charging Starting:

Ignition, starting, and charging system service and repair

Transmission Auto:

Automatic transmission service, diagnosis, and repair

Transmission Manual:

Manual transmission service, diagnosis, and repair

Drivetrain:

Transfer case, propeller shaft, drive shaft, differential, axle service and repair

Suspension:

Axle and suspension system service, diagnosis, and repair

Wheels Tires:

Tire and wheel service, specifications

Brakes:

Brake system control, service, diagnosis, and repair

Parking Brake:

Parking brake system service and repair

Steering:

Steering column and power steering system service, diagnosis, and repair

Climate Control:

Air conditioning system service and repair

Safety Systems:

Supplemental restraint system (SRS), seat belts, engine immobilizer

Cruise Control:

Cruise control system service and repair

Wipers Washers:

Wiper and washer system service and repair

Door Locks:

Door lock system service and repair

Instruments Audio:

Meter, audio/visual systems service and repair

Horn:

Horn system service and repair

Glass Mirrors:

Windshield, glass, and mirror service

Interior:

Instrument panel, seats, interior trim service and repair

Exterior:

Exterior trim, body panel service and repair

Electrical:

Comprehensive electrical system troubleshooting and repair

Multiplex Can:

Multiplex and CAN communication systems diagnosis and repair

Maintenance:

Scheduled maintenance, fluid changes, inspections

Diagnostics:

System diagnostics, troubleshooting guides, fault code interpretation

Repair:

Detailed step-by-step repair instructions for all systems

Wiring Schematics:

Complete electrical wiring schematics for all circuits

Specifications:

Torque specifications, tolerances, fluid capacities, electrical values

Depth:

Factory-level, vehicle-specific, from basic maintenance to complete engine and transmission rebuilds

Quality:

Detailed diagrams and illustrations included

📊 Manual Specifications

Format:

PDF

Printability:

All pages are printable, with option to blow up images

Type:

Digital (no physical binding)

Digital Medium:

Digital PDF

Operating Systems:

Windows Vista (32/64-bit), XP, ME, 98, NT, 2000, and Mac compatible

Software:

Adobe PDF Reader and Winzip (free online)

⚙️ Engine Specifications

Engine Options 2008:

Typically 3.0L inline-6 (N52B30) and 3.0L twin-turbo inline-6 (N54B30) for Z4 30i and Z4 35i (E89 chassis introduced later in 2009, E85/E86 production was prior). For 2008 E85/E86, likely 3.0L (Z4 sDrive30i) and potentially 2.5L (Z4 sDrive23i in some markets) or higher performance variants like the Z4 M Roadster/Coupé with the S54 engine.

Typical Horsepower 3.0L:

Around 255 hp for the N52B30

Typical Torque 3.0L:

Around 220 lb-ft for the N52B30

Injection Type:

Electronic Fuel Injection (EFI), likely with direct injection on higher performance models

🔧 Transmission

Standard Transmission:

6-speed manual transmission

Optional Transmission:

6-speed Steptronic automatic transmission

Clutch Type:

Hydraulically actuated single dry plate clutch (for manual transmission)

📐 Dimensions

Body Styles:

2-door convertible (E85 Roadster), 2-door coupé (E86 Coupé)

Wheelbase:

Approximately 2497 mm (98.3 in)

Curb Weight:

Varies by model, approximately 1450-1600 kg (3197-3527 lbs)

🛡️ Safety Features

NHTSA Ratings:

Not explicitly provided, but generally well-regarded for its class. Refer to NHTSA for specific recalls.

Active Safety:

Dynamic Stability Control (DSC), Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Traction Control (ASC+T)

Passive Safety:

Front airbags, side airbags, rollover protection system (deployable roll bars for Roadster)

💡 Technology Features

Infotainment System:

BMW iDrive system (Professional Radio or Navigation system with 6.5-inch or 8.8-inch display)

Connectivity:

Bluetooth connectivity for phone calls, optional USB interface for audio

Driver Assistance Features:

Park Distance Control (PDC), Cruise Control

🔧 Maintenance

Oil Change Interval:

Typically every 10,000-15,000 miles or as indicated by the Condition Based Service (CBS) system.

Brake Fluid Change:

Every 2 years, regardless of mileage.

Coolant Change:

BMW Long-Life Coolant, typically replaced at longer intervals, often around 4-5 years or 100,000 miles, but consult specific manual for exact interval.

Engine Oil Specification:

BMW LL-01 or LL-04 approved synthetic oil (e.g., SAE 0W-40, 5W-30, or 5W-40 depending on climate and specific engine)

Transmission Fluid Auto:

BMW approved ATF (e.g., LT-5 or equivalent)

Transmission Fluid Manual:

BMW MTF LT-2 or equivalent for manual transmissions

Brake Fluid Specification:

DOT 4 or DOT 4 PLUS

Common Issues Engine:

VANOS solenoid issues, oil leaks (valve cover gasket, oil pan gasket), ignition coil failures, spark plug wear.

Common Issues Electrical:

Water pump failures (electric pump on N52), A/C system issues, sensor failures.

Common Issues Suspension:

Worn control arm bushings, strut mount wear.

Common Issues Convertible Top:

Hydraulic system leaks, motor issues, fabric wear on older models.

📚 Vehicle History

Bmw Heritage:

Known for producing sporty, driver-focused vehicles with a focus on performance and handling.

Z4 Second Generation E85 E86:

Introduced in 2002 (E85) and 2006 (E86 Coupé), replaced by the E89 generation in 2009.

Manufacturing Location:

Spartanburg, South Carolina, USA

🏆 Awards & Recognition

Ward Best Engine Award:

BMW's inline-6 engines often received awards for smoothness and performance, including Wards 10 Best Engines for the N52 (3.0L) and N54 (3.0L twin-turbo) in various iterations.

Driving Dynamics:

Consistently praised for excellent handling and responsive driving dynamics by automotive publications.