1 1

Porsche

PORSCHE 951 ML3.1 1988 BOSCH Wiring Diagram

PORSCHE 951 ML3.1 1988 BOSCH Wiring Diagram

$16.99
$16.99
Aanbieding Uitverkocht
Verzendkosten worden berekend bij de checkout.
Vehicle data plateRef 194199
Brand
Porsche
Vehicle
Cars
Models covered
951, Bosch, ML3.1
Years
1988
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

  • Download link opens on the order page immediately
  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your model year? Ask us before you buy
🏷️ Basic Information
Identification
Make:
Porsche
Model:
951
Year:
1988
Chassis Code:
944S2/951
Generation:
Second Generation (944 facelift and turbo variant)
Codes
Engine Code Designation:
M44.51 (Turbo)
Transmission Code Designation:
G30/M030 (transaxle)
👋 Introduction
Market Position
Market Segment:
Luxury Performance Sports Coupe
Positioning:
High-performance, track-capable grand tourer with a focus on driver engagement and build quality.
Competitive Analysis
Primary Competitors:
Ferrari 328 GTB, Chevrolet Corvette C4 (ZR-1 variants), Nissan 300ZX Z31 (late models), Toyota Supra Turbo (MkIII).
Key Features
Powertrain:
Turbocharged inline-four cylinder engine, rear-wheel drive, transaxle layout for optimal weight distribution.
Design:
Aerodynamic styling, Porsche's characteristic build quality, advanced (for its time) suspension and braking systems.
Manual Value Proposition:
Essential tool for diagnosing and resolving complex electrical issues, saving significant labor costs.
📋 Manual Details
Coverage Areas
Primary Focus:
Bosch DME (Digital Motor Electronics) and related electrical systems
Secondary Focus:
General electrical troubleshooting, wiring diagrams, component identification
Page Count
Estimated Pages:
N/A (wiring diagrams are typically a series of sheets or a comprehensive booklet)
Manual Type
Type:
Wiring Diagram Manual / Electrical Troubleshooting Manual
Language
Language:
English
Format
Format:
Likely Printed Booklet or High-Resolution Scanned PDF
📖 Manual Coverage
Systems Covered
Engine Management:
Bosch DME L-Jetronic/Motronic variants, fuel injection, ignition system, boost pressure control
Lighting:
Headlights, taillights, interior lighting, fog lights
Instruments Gauges:
Speedometer, tachometer, fuel gauge, oil pressure, voltmeter, boost gauge
Comfort Convenience:
Power windows, power mirrors, central locking, climate control (HVAC blower, basic functions)
Audio:
Factory radio wiring, speaker circuits
Safety Systems:
ABS (Anti-lock Braking System) electrical circuits, turn signals, hazard lights
Chassis Electronics:
Wiper/washer system, horn, starter system, charging system
Procedures Included
Troubleshooting:
Systematic diagnostic procedures for electrical faults, symptom-based troubleshooting
Wiring Identification:
Color coding, wire gauge, connector pinouts
Component Testing:
Testing of sensors, actuators, relays, fuses, and electrical modules
Repair Guidelines:
Instructions for repairing wiring harnesses, replacing connectors and components
Technical Depth
Depth:
Detailed, suitable for experienced technicians and knowledgeable DIY enthusiasts
Diagnostics Level:
Advanced electrical diagnostics, circuit analysis
📊 Manual Specifications
File Format
File Format:
Likely PDF (if digital) or high-quality print
Print Quality
Print Quality:
High resolution, clear line drawings and text (assumed for usability)
Binding Type
Binding Type:
Spiral bound or saddle-stitched (for print versions to lay flat)
Paper Type
Paper Type:
Durable, matte finish paper suitable for workshop environments (for print versions)
⚙️ Engine Specifications
Primary Engine
Engine Type:
Inline-four, turbocharged, intercooled
Displacement:
2479 cc (2.5 Liters)
Bore X Stroke:
104.0 mm x 73.0 mm
Compression Ratio:
8.5:1
Performance
Horsepower:
247 hp (184 kW) @ 6000 rpm
Torque:
282 lb-ft (383 Nm) @ 4500 rpm
Fuel System
Fuel Delivery:
Bosch L-Jetronic fuel injection with Bosch Motronic engine management
Fuel Type:
Premium Unleaded Gasoline (91+ Octane)
Ignition System
Ignition Type:
Distributorless ignition system (DIS) managed by Motronic ECU
Cooling System
Cooling Type:
Water-cooled, thermostatically controlled fan
🔧 Transmission
Standard
Type:
5-speed manual transaxle
Optional
Type:
Tiptronic automatic (less common on 951, more prevalent on 944 S2, but early S2 could have it)
Features
Layout:
Rear-mounted transaxle for transaxle layout (engine front, gearbox rear)
Fluid Type:
API GL-4 or GL-5 gear oil (refer to specific Porsche manual for exact spec, e.g., 75W-90)
📐 Dimensions
Exterior
Length:
4254 mm (167.5 in)
Width:
1736 mm (68.3 in)
Height:
1270 mm (50.0 in)
Wheelbase:
2499 mm (98.4 in)
Front Track:
1474 mm (58.0 in)
Rear Track:
1474 mm (58.0 in)
Weights
Curb Weight:
Approximately 1370 kg (3020 lbs)
Gross Vehicle Weight Rating Gvwr:
N/A (typically not specified in this detail for sports cars)
🛡️ Safety Features
Ratings
Crash Test Results:
No formal NHTSA or IIHS ratings available for this specific model year, but known for robust chassis design.
Active Features
ABS:
Standard Bosch ABS (Anti-lock Braking System)
Braking System:
Four-wheel disc brakes, ventilated front and rear, often with M030 option for larger calipers/rotors.
Passive Features
Airbags:
Driver-side airbag (standard for later production models/market regulations)
Seatbelts:
Three-point retractable seatbelts
Chassis Structure:
Reinforced safety cage structure, crumple zones
💡 Technology Features
Infotainment
Audio System:
Factory premium sound system with cassette player, potential for upgraded head units.
Driver Assistance
ABS:
Bosch ABS system for enhanced braking control.
Connectivity
N/A:
No integrated connectivity features like Bluetooth or USB as standard.
🔧 Maintenance
Service Intervals
Oil Change:
Every 5,000-7,500 miles or annually, whichever comes first. Use synthetic oil.
Timing Belt:
Every 30,000-50,000 miles or 3-5 years. Critical maintenance item.
Spark Plugs:
Inspect at 15,000 miles, replace as needed (typically every 30,000 miles).
Fluid Specifications
Engine Oil:
API SG, ACEA A2/B2 rated synthetic oil, 10W-30 or 5W-40 recommended (e.g., Mobil 1 5W-30/40 or equivalent).
Coolant:
50/50 mix of Porsche-approved G12 coolant and distilled water.
Brake Fluid:
DOT 4 or DOT 5.1, low-moisture content.
Known Issues
Electrical Concerns:
Degradation of wiring insulation (especially around engine bay and rear hatch), faulty headlight relays, coolant level sensor issues, ABS sensor failure.
Mechanical Concerns:
Timing belt failure (catastrophic engine damage), fuel pressure regulator issues, clutch wear, potential for oil leaks (e.g., rear main seal).
Turbo System:
Wastegate actuator issues, intercooler leaks, turbocharger wear.
📚 Vehicle History
Brand Heritage
Heritage Summary:
Porsche's legacy of motorsport success and engineering excellence.
Model Evolution
944 Lineage:
The 951 (944 Turbo) is the high-performance variant of the Porsche 944, which itself evolved from the 924.
951 Introduction:
Introduced in 1985 for the 1986 model year, the 951 brought significant performance upgrades to the 944 platform.
Production
Production Years:
1986-1991 (for the 944 Turbo/S2 generation)
Manufacturing Location:
Neckarsulm, Germany (Audi AG plant, contracted by Porsche)
🏆 Awards & Recognition
Recognitions
Car And Driver 10 Best:
944 Turbo often cited in '10 Best' lists for its handling and performance during its production run.
Ratings
Performance Reviews:
Universally praised by automotive journalists for its driving dynamics, balanced chassis, and powerful turbo engine.

Delivery & file format

This is a digital PDF download, not a printed book. After payment the download link appears on your order confirmation page and is emailed to the address you entered. Files open in any PDF reader on phone, tablet or computer and can be printed.

Check the model year and engine before you buy

Manufacturers change procedures, wiring and part numbers between model years and engine options. If your VIN plate shows a year or engine code that is not listed on the data plate above, contact us with the model, year and VIN and we will confirm coverage before you order.

Alle details bekijken
  • Instant download Link on the order page and in your inbox within a minute.
  • Secure checkout Encrypted Shopify payments — card, PayPal, Apple Pay, Google Pay.
  • Print-ready PDF Searchable text; print only the pages you take to the bench.
  • Coverage check Not sure it fits? Send the model and VIN before you buy.