2002-2026 BMW Z4, i3, i4, i8, iX, iX1, iX3 Repair Manuals & Circuit Diagrams

Includes wiring schematics, disassembly & assembly instructions, maintenance guides, ECU mounting positions, sensor locations, timing belts, timing chains, camshaft sprockets, crankshaft sprockets, cylinder heads, cylinder blocks, cylinder head gaskets, intake manifolds, exhaust manifolds, throttle bodies, pistons, main bearings and connecting rod bearings, spark plugs, ignition coils, oil pumps, shock absorbers, suspension assemblies, steering gears, chassis, interior trim, instrument panels, door panels, sunroofs, BMS, high-voltage batteries, VCU, motor controllers, battery packs, on-board chargers, A/C compressors, fuse & relay diagrams, pin definitions, wiring harness layout and operating principles.

Many repair shops get stuck when working on BMW’s niche sports cars and early i-series electric vehicles. Service resources for common 3 Series and 5 Series are easy to find online, but the Z4 roadster, range-extended i3, futuristic i8 sports car and flagship all-electric iX are low-volume models. When these vehicles come into the shop, technicians hesitate to start repairs without factory documentation.

Take the Z4 for example. It spans multiple chassis generations including E85/E86/E89/G29. The convertible roof mechanism is precisely engineered. Minor errors during disassembly, assembly or calibration can lead to abnormal noises and jamming. Only fragmented short disassembly videos are available online, lacking factory tolerance specifications. Repeated disassembly may easily damage expensive roof components.

The i3 features a unique early range-extended and battery-electric architecture. The i8 hybrid sports car has an exclusive powertrain that operates completely differently from conventional BMW gasoline vehicles. The high-voltage systems in the newer i4, iX, iX1 and iX3 cannot be serviced using repair logic designed for combustion-engine cars. Most publicly available materials are limited to fault case studies. Battery pack torque values, high-voltage pinouts and insulation test standards are hard to source, and blind disassembly carries significant safety risks.

This compilation contains complete factory repair manuals plus high/low-voltage circuit diagrams for the 2002‑2026 BMW Z-series sports cars and i-series models. Roadsters, vintage hybrid vehicles and next-generation EVs are filed separately, with independent documentation for each chassis generation, solving the difficulty of sourcing reference materials for rare models.

Key Covered Models

▫️Convertible sports cars: Z4 E85/E86/E89/G29 ▫️Special hybrid sports car: i8 I12/I15 ▫️Urban range-extended model: i3 (BEV / REx version) ▫️Next-generation electric vehicles: i4 G26, iX I20, iX1, iX3 G08; G28 i3

Practical Repair Content

Sports Car Special Section: Complete chassis, transmission, convertible roof disassembly, assembly and calibration tolerances for Z4.i8 Hybrid Exclusive Section: Three-electric system, hybrid drive unit disassembly and special cooling system repair procedures.i3 Range-Extended: Factory specifications for rear-mounted motor, range extender engine and battery pack.Modern i-series EVs: Drawings of high-voltage batteries, BMS and drive motors; standardized high-voltage power-up/power-down and insulation testing with clear warnings for high-voltage work.Vehicle Electrical System: Fuse box layouts, pinout and harness diagrams, fault code library, and collision sheet metal alignment dimensions.

Supports VIN parsing to identify chassis type and one-click retrieval of matching documents. You can search relevant repair chapters simply by describing faults verbally. Suitable for luxury niche specialty garages, modification shops and general repair facilities. No more scrambling to locate wiring diagrams when encountering rare BMW vehicles. Leave a message if you need the full package.