🏷️ Basic Information Identification Make: Acura Model: Legend Year: 1991 Codes Chassis Code: KA7 (Coupe), KA8 (Sedan) Engine Code: C27A1 (2.7L V6) 👋 Introduction Market Position Positioning: The 1991 Acura Legend represented Honda's luxury flagship, competing with established European and American luxury sedans and coupes. Competitive Analysis Competitors: BMW 5 Series, Mercedes-Benz E-Class, Lexus LS 400, Infiniti Q45 Key Features Design: Sleek, aerodynamic styling by Toshiaki Tsuchiya; focus on driver comfort and sophisticated engineering. Powertrain: High-revving V6 engines, advanced front-wheel drive chassis, available luxury features. 📋 Manual Details Coverage Areas Primary Coverage: All aspects of 1991 Acura Legend service and repair Secondary Coverage: Troubleshooting, diagnostics, maintenance schedules, electrical diagrams Page Count Estimated Page Count: 1000+ Manual Type Type: Factory Service Manual (FSM) Language Language: English Format Format: Print (Likely) 📖 Manual Coverage Systems Covered Engine: Engine mechanical, lubrication, cooling, fuel, ignition, emissions control, ECU diagnostics Transmission: Automatic transmission (B7VA), clutch system (if applicable), shift control Drivetrain: Front-wheel drive, half-shafts, drive axles, differential Suspension: Front and rear suspension components, shock absorbers, springs, bushings, alignment specifications Brakes: Hydraulic system, ABS (Anti-lock Braking System), disc brakes, brake pad/rotor replacement, bleeding procedures Steering: Power steering system, steering rack, tie rods, linkage, alignment Electrical: 12V battery system, charging system, starting system, lighting, accessories, fuses, relays, wiring diagrams, ECU (Engine Control Unit), VCM (Vehicle Control Module) HVAC: Heating, Ventilation, and Air Conditioning system diagnosis and repair Body: Exterior panels, interior trim, glass, door mechanisms, body sealing Chassis: Frame, subframes, body mounting Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, tune-ups Troubleshooting: Diagnostic flowcharts for common issues, symptom-based diagnosis Repair: Component removal and installation, part replacement, adjustment procedures Diagnostics: OBD-I (On-Board Diagnostics) codes and interpretation, sensor testing, actuator testing Specifications: Torque specifications, clearance measurements, fluid capacities, electrical parameters Technical Depth Depth: Comprehensive: Covers basic maintenance to complete engine and transmission overhauls, detailed electrical troubleshooting 📊 Manual Specifications File Format Quality: High-resolution scans ensuring clarity of text and diagrams (if digital) Searchability: Text-searchable PDF (if digital) for quick information retrieval Print Quality Print Quality: Professional printing with clear text and high-contrast diagrams (for physical copies) Binding Type Binding: Professional binding (e.g., perfect binding, spiral binding) for durability and ease of use Paper Type Paper Type: Durable paper stock resistant to shop environments ⚙️ Engine Specifications Primary Engine Engine Type: V6 SOHC (Single Overhead Cam) Displacement: 2675 cc (2.7 Liters) Bore X Stroke: 82.0 mm x 82.7 mm Compression Ratio: 9.0:1 Performance Horsepower: 170 hp @ 5500 rpm (approx.) Torque: 160 lb-ft @ 4500 rpm (approx.) Fuel System Fuel Delivery: Programmed Fuel Injection (PGM-FI) Fuel Type: Unleaded Gasoline (87 octane minimum, premium recommended) Engine Management ECU Type: Honda PGM-FI system 🔧 Transmission Standard Transmission Type: 4-speed Automatic (B7VA) Optional Transmission Type: 5-speed Manual (Rare in North America for this year) Features Shift Control: Driver-selectable modes (e.g., Sport/Normal) Fluid Type Automatic Transmission Fluid: Honda ATF-Z1 (or equivalent compatible fluid, consult manual for specific recommendations) 📐 Dimensions Exterior Length: 191.1 in (4854 mm) Width: 70.5 in (1791 mm) Height: 54.7 in (1390 mm) Wheelbase: 110.0 in (2794 mm) Weights Curb Weight: 3400-3600 lbs (1542-1633 kg) depending on trim and configuration 🛡️ Safety Features Ratings NHTSA Front Impact: Not explicitly rated under modern standards, but designed with safety as a priority. Passive Features Airbags: Driver's side airbag (standard) Seatbelts: Front 3-point seatbelts with pretensioners Body Structure: Reinforced safety cage construction Active Features ABS: Anti-lock Braking System (ABS) standard on most trims 💡 Technology Features Infotainment Audio System: Premium ETR (Electronically Tuned Radio) AM/FM stereo with cassette player, often Bose sound system option. Climate Control: Automatic climate control with digital display on higher trims. Driver Assistance Cruise Control: Standard cruise control. Traction Control: Available Traction Control System (TCS) on some models. Comfort Features Seating: Leather-trimmed seats, power-adjustable driver's seat with memory. Windows Locks: Power windows, power door locks, power mirrors. Sunroof: Power glass sunroof. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 miles or 6 months (consult manual for specific recommendations based on driving conditions). Air Filter Replacement: Every 15,000 - 30,000 miles or as needed. Spark Plug Replacement: Typically around 60,000 - 100,000 miles, depending on spark plug type. Timing Belt Replacement: Critical replacement interval, typically 90,000 - 105,000 miles or 7 years for interference engines (confirm for C27A1). Fluid Specifications Engine Oil Type: API Service SG or SH, SAE 5W-30 or 10W-30 (check manual for specific viscosity recommendations). Coolant Type: Honda Type 2 Coolant (or equivalent silicate-free coolant, typically a 50/50 mix of antifreeze and distilled water). Brake Fluid Type: DOT 3 or DOT 4 (check manual). Power Steering Fluid Type: Honda Power Steering Fluid (or equivalent specified fluid). Known Issues Engine Performance: Carbon buildup on intake valves, idle control valve issues, timing belt tensioner failure. Transmission: B7VA automatic transmission can be sensitive to fluid...