Target Audience:
Professional automotive technicians, DIY enthusiasts, BMW owners seeking in-depth maintenance and repair knowledge.
Value Proposition:
Offers the same level of detail and accuracy as OEM workshop manuals at a fraction of the cost, enabling comprehensive DIY repairs and accurate professional diagnostics.
Completeness:
Covers all models and trims within the specified production years, ensuring universal applicability for the E23 generation.
Usability:
Organized logically, with clear instructions, diagrams, and specifications, facilitating efficient use.
Systems Covered:
Engine mechanical, fuel, ignition, lubrication, cooling, exhaust, transmission (manual & automatic), driveline, suspension, steering, brakes (hydraulic & ABS), electrical system, climate control, body, interior, troubleshooting, diagnostics, maintenance schedules, specifications, torque values, wiring diagrams.
Estimated Page Count:
Approximately 1500+
Type:
Service Repair Workshop Manual
Engine Mechanical:
Detailed procedures for engine removal/installation, cylinder head, valve train, pistons, connecting rods, crankshaft, timing components, oil pump, lubrication system.
Engine Management:
Fuel injection (Bosch L-Jetronic, Motronic), ignition system, emission controls, diagnostics and troubleshooting of sensors and actuators.
Transmission:
Both Getrag 5-speed manual and ZF 4-speed automatic transmission overhaul, repair, adjustment, and troubleshooting.
Brakes:
Front and rear brake system service, caliper overhaul, disc replacement, brake line repair, ABS system troubleshooting and component replacement.
Electrical:
Comprehensive wiring diagrams for all circuits, troubleshooting of starting/charging system, lighting, instruments, power accessories, fuse/relay identification and testing.
Maintenance:
Routine maintenance tasks such as oil changes, filter replacements, spark plug replacement, belt adjustments, fluid checks and changes, lubrication points.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, fault code identification (where applicable), symptom-based troubleshooting guides.
Repair Overhaul:
Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation for virtually all vehicle systems.
Depth:
Comprehensive, covering everything from basic fluid checks to complete engine and transmission overhauls, including advanced electrical diagnostics and body repair procedures.
Engine Code 733I:
M30B32 (3.2L Inline-6)
Engine Code 735I:
M30B34 (3.4L Inline-6)
Horsepower 733I:
181 hp @ 5500 rpm (approx.)
Torque 733I:
215 lb-ft @ 3500 rpm (approx.)
Horsepower 735I:
182 hp @ 5400 rpm (approx.)
Torque 735I:
224 lb-ft @ 3600 rpm (approx.)
Injection System:
Bosch L-Jetronic (early models) / Motronic (later models)
Fuel Type:
Unleaded gasoline (premium recommended)
Configuration:
Inline 6-cylinder, SOHC
Bore X Stroke 733I:
89.0 mm x 84.0 mm
Bore X Stroke 735I:
92.0 mm x 86.0 mm
Transmission 733I:
4-speed manual (Getrag 265)
Transmission Optional:
4-speed automatic (ZF 4HP22)
Transmission 735I:
5-speed manual (Getrag 265) or 4-speed automatic (ZF 4HP22)
Clutch Type:
Hydraulically operated single-plate dry clutch (manual)
Automatic Transmission Fluid:
Dexron II or equivalent (refer to manual for specific BMW part number)
Wheelbase:
2,830 mm (111.4 in)
Length:
4,850 mm (190.9 in)
Width:
1,798 mm (70.8 in)
Height:
1,400 mm (55.1 in)
Curb Weight Approx:
1,600 - 1,750 kg (3,527 - 3,858 lbs)
Gross Vehicle Weight Rating:
Not explicitly specified, refer to vehicle placard.
Crash Test Data:
Limited official crash test data available for this era, but designed with robust safety cage and crumple zones.
ABS:
Anti-lock Braking System (ABS) available as an option on most models, standard on later 735i.
Seatbelts:
3-point inertia reel seatbelts front and rear.
Headrests:
Adjustable front and rear headrests.
Body Structure:
Reinforced chassis and body construction for occupant protection.
Audio System:
Premium cassette stereo systems, often with advanced sound processing for the era. Optional CD players available later.
Climate Control:
Automatic climate control system, often featuring dual-zone capabilities.
Cruise Control:
Standard cruise control system.
Early Features:
Power windows, power locks, central locking, heated seats, power adjustable mirrors, optional sunroof.
Oil Change Interval:
Every 5,000 - 7,500 miles or 6-12 months (depending on driving conditions; refer to manual).
Spark Plug Replacement:
Typically every 30,000 miles, but consult manual for specific plug type and interval.
Engine Oil Type:
API SG or SH, SAE 15W-40 or 10W-40 (check manual for exact viscosity and BMW approval).
Coolant Type:
Ethylene glycol based antifreeze mixed 50/50 with distilled water (BMW approved).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Cooling System:
Radiator leaks, heater core issues, thermostat housing leaks, fan clutch failure.
Fuel System:
Fuel pump failure, clogged fuel injectors, fuel pressure regulator issues.
Electrical:
Corroded grounds, failing relays, aged wiring insulation, dashboard warning lights.
Suspension:
Worn control arm bushings, ball joints, shock absorbers, self-leveling rear suspension issues (if equipped).
Interior:
Sagging headliner, cracking dashboard plastics, worn leather/vinyl.
Bmw Philosophy:
BMW's focus on 'The Ultimate Driving Machine', emphasizing performance, luxury, and engineering excellence.
E23 Generation:
The first generation of BMW's flagship luxury sedan, replacing the E12 5 Series as the top-tier model. Introduced in 1977, the E23 was produced until 1986 (though the 733i/735i models extended into 1987 in some markets).
Manufacturing Locations:
Germany
Sales Figures E23:
Approximately 189,000 units produced globally over its lifespan.
Automotive Press Reviews:
Consistently praised by automotive journalists for its performance, comfort, and advanced engineering, often cited as a benchmark for luxury sedans of its time.
Overall Legacy:
Considered a classic BMW, representing the pinnacle of luxury and performance from the brand in the early to mid-1980s.
