BMW 7 Series E32 1988–1992 Bentley Service Manual (P/N ISBN-10 0-8376-0328-5 / ISBN-13 978-0-8376-0328-5)

Bentley Publishers’ BMW 7 Series service manual covers the E32 735i/735iL (1988–1992), 740i/740iL (1993–1994), and 750iL (1988–1994). This is Bentley Stock No. B794, ISBN-10 0-8376-0328-5 / ISBN-13 978-0-8376-0328-5.

PDF Search, Bookmarks, and Wiring Detail

Finding pages and reading schematics: Searchable text is limited to the back cover; the repair chapters and wiring diagrams have no searchable text. Embedded bookmarks use file-style names rather than chapter titles, and several return to the cover. Small labels on the checked wiring diagrams require zooming.

ZIP download containing one printable PDF with 982 pages, including both covers, 17 blank/divider pages, and one catalog page. The original chapter layout, tables, illustrations, electrical wiring-diagram section, and index are retained.

Engine, Drivetrain, and E32 Electrical Systems

This is a selection of the covered work; additional topics include on-board computer removal and seat-belt component replacement.

• Engine repair: Step-by-step engine and cylinder-head removal/refitting, valvetrain work, timing-chain service, and lubrication-system repair for the M30, M60, and M70.

• Driveability diagnosis: Compression testing, ignition checks, fuel-supply and injection tests, air-flow and vacuum-leak checks, and engine-management fault-code tables.

• Transmission and clutch: Unit removal/installation, external seal replacement, automatic-transmission stall-speed and ATF main-pressure tests, and clutch mechanical and hydraulic service.

• Brakes and suspension: ABS and ASC/ASC+T service, brake-booster tests, wheel-bearing replacement, steering and alignment work, plus LAD and EDC III procedures.

• Electrical troubleshooting: Model-year wiring diagrams, control-module pinouts, component locations, and voltage-drop, continuity, starter, and charging-system checks.

• Climate control and body: IHKA heater and A/C component replacement, door and window adjustments, central locking, seat mechanisms, and sunroof service.

Written for repair professionals and DIY BMW owners familiar with basic automotive repair and safe workshop practices; specialist procedures require the specified tools and experience.

Service Schedules and DME Diagnosis

Routine service is tied directly to the BMW Service Indicator system, with Oil Service, Inspection I and Inspection II schedules and the Service Indicator reset procedure. Maintenance covers oil and filters, M30 valve clearance, drive belts, spark plugs, cooling-system service, brakes, steering, and suspension inspections.

Variant-specific fluids: Engine-oil capacities include the filter change. The coolant table distinguishes the 750iL at 15 L through 9/90 and 13 L from 9/90, alongside model-specific ATF and lubricant specifications.

Engine management: DME 1.3 applies to 1988–1992 735i/L models, DME 3.3 to 1993–1994 740i/L models, DME 1.2 to 1988–1990 750iL cars, and DME 1.7 to 1991–1994 750iL cars. The fuel-injection chapter also distinguishes early and late DME 1.2 pin assignments.

Check Engine fault-code tables, battery-voltage and ground checks, and DME input/output diagnosis help match the test information to the installed management system before tracing a driveability fault.

EML/ADS throttle-control sections describe operation and selected component checks and replacement. System fault diagnosis calls for special BMW test equipment.

Valvetrain, Timing, and Cooling Repairs

The repair chapters distinguish M30 mechanical valve adjustment from the hydraulic valve adjusters used on the M60 and M70. Cylinder-head reconditioning data includes camshaft wear limits and valve-guide and valve-seat dimensions. Engine tables also list output, compression ratio, and torque.

Timing tools: The procedures identify BMW tool 11 2 300 for locking the crankshaft at TDC, 11 3 190 for the M70 camshafts, and 11 1 060 for M30 camshaft work.

Incorrect clamping of tool 11 1 060 during M30 camshaft removal can damage the valves. Misconnected M60 knock-sensor wiring can result in serious engine damage.

Lubrication coverage includes oil-pressure and oil-level-sensor tests, oil-pan removal, and oil-pump service. Cooling procedures cover thermostat and coolant-pump replacement, leak testing, and bleeding; exhaust-system and manifold removal are also documented.

Transmission Service and Final-Drive Limits

Automatic-transmission procedures distinguish the ZF 4 HP 22 EH, ZF 4 HP 24 EH (called 4 HP 24 in the repair chapter), and ZF A5S 560Z. The Getrag 260/6 chapter covers external service, oil seals, and removal/installation on the 735i.

Internal transmission teardown and overhaul are not covered. Final-drive coverage likewise stops at unit removal/installation, mounts, fluid service, and external seals; internal differential disassembly and repair are excluded.

Clutch work includes friction-component inspection, master/slave-cylinder replacement, and hydraulic bleeding. Driveshaft procedures cover alignment, flex-disc replacement, and center-bearing service.

LAD, EDC III, and Brake Hydraulics

LAD procedures cover pressure testing, filling and bleeding, ride-height adjustment, regulator-valve and accumulator service, and troubleshooting. EDC III material adds damper-solenoid settings, acceleration and steering-angle sensors, control-module pinouts, and fault diagnosis.

Brake coverage distinguishes vacuum and hydraulic assist, with pressure, leak, and accumulator tests for the hydraulic booster. ASC+T-equipped cars have dedicated brake and hydraulic-system bleeding procedures.

Wiring, Body Electronics, and IHKA

Named schematics include Ground Distribution, Engine Management, Engine Cooling, Air Conditioning & Heating, Anti-Theft, and Exterior Lights. Many sheets distinguish model year and equipment configuration, including early and late production versions.

For electrical repair and restoration work, the combination of schematics, pinouts, relay/fuse locations, and system-specific diagnostics supports fault tracing across the installed systems. The electrical and body-equipment sections also address instruments, exterior lighting, wipers, switches, ZKE central body electronics, central locking, seats, sunroof, and radio.

Scope limits: IHKA coverage includes heater controls and A/C component replacement, but excludes refrigerant discharge, evacuation, and recharge. SRS coverage is limited to component removal and installation; airbag-system fault diagnosis and repair require specialist service.

Because this manual covers engine removal, transmission work, brake hydraulics, SRS components, high-voltage ignition, and A/C service, the safety warnings and correct lifting, electrical-isolation, and refrigerant-handling practices should be followed before repair work begins.

Examples of Booster Test Values and Plug Data

For hydraulic-booster-equipped cars, the test data lists upper switching pressure of 52–57 bar and lower switching pressure of 36–41 bar with the engine running. The engine-off holding test allows a maximum pressure drop of 5 bar after five minutes.

Spark-plug application data specifies a 0.7–0.8 mm electrode gap for the M30 and M70; the listed M60 plug is non-adjustable.