Segment:
        
        
            Compact premium sports coupe
        
     
    
        
            Target Audience:
        
        
            Enthusiast drivers seeking performance and luxury in a smaller package
        
     
    
    
        
            Key Competitors:
        
        
            Audi A3, Infiniti G37 Coupe, Mercedes-Benz C-Class Coupe (C204), Lexus IS Coupe
        
     
    
    
        
            Performance Focus:
        
        
            RWD platform, potent turbocharged engine, engaging driving dynamics
        
     
    
        
            Premium Appointments:
        
        
            High-quality interior materials, advanced technology for its time
        
     
 
    
    
    
        
            Powertrain:
        
        
            Engine operation, cooling system, fuel system, exhaust system, ignition system
        
     
    
        
            Transmission:
        
        
            Automatic and Manual transmission operation, gear selection, clutch system (if manual)
        
     
    
        
            Chassis And Suspension:
        
        
            Steering, suspension components, wheel and tire care
        
     
    
        
            Brakes:
        
        
            Braking system operation, parking brake, ABS, DSC (Dynamic Stability Control)
        
     
    
        
            Electrical System:
        
        
            Battery, charging system, lighting system, fuses, wiring diagrams (basic overview, not detailed repair)
        
     
    
        
            Interior Features:
        
        
            Seats, seat belts, airbags, climate control, infotainment system, power accessories, interior lighting
        
     
    
        
            Exterior Features:
        
        
            Doors, windows, mirrors, wipers, exterior lighting, keyless entry
        
     
    
        
            Instrumentation:
        
        
            Instrument cluster layout, warning lights, gauges, driver information system
        
     
    
        
            Safety Systems:
        
        
            Airbag system, seat belt pretensioners, child restraint systems (ISOFIX), LATCH system
        
     
    
        
            Driver Assistance:
        
        
            DSC (Dynamic Stability Control), DTC (Dynamic Traction Control), Cruise Control
        
     
    
        
            Infotainment:
        
        
            Radio, CD player, iDrive system (basic operation), audio controls, navigation system (if equipped)
        
     
    
    
        
            Operation:
        
        
            Starting and stopping the engine, driving, parking, using controls
        
     
    
        
            Maintenance:
        
        
            Basic checks (fluid levels, tire pressure), cleaning, fluid top-offs
        
     
    
        
            Troubleshooting:
        
        
            Understanding warning lights and messages, basic troubleshooting for common issues
        
     
    
        
            Safety Procedures:
        
        
            Proper use of seat belts, child seat installation, emergency procedures
        
     
    
        
            Tire And Wheel:
        
        
            Tire pressure monitoring, changing a flat tire (basic instructions), wheel care
        
     
    
    
        
            Depth:
        
        
            Consumer-level operation and maintenance
        
     
    
        
            Diagnostics:
        
        
            No in-depth diagnostic procedures or repair instructions
        
     
    
        
            Repair:
        
        
            Not intended for repair procedures; recommends authorized service centers
        
     
 
    
    
    
    
        
            Engine Type:
        
        
            Inline 6-cylinder Twin-Turbocharged
        
     
    
        
            Displacement:
        
        
            2979 cc (3.0 Liters)
        
     
    
    
        
            Horsepower:
        
        
            300 hp @ 5800 rpm
        
     
    
        
            Torque:
        
        
            300 lb-ft @ 1300-5000 rpm
        
     
    
    
        
            Fuel Delivery:
        
        
            Direct Injection (High-Pressure Fuel Pump)
        
     
    
        
            Recommended Fuel:
        
        
            Premium Unleaded gasoline, 91 octane or higher
        
     
    
    
        
            ECU Type:
        
        
            MSD80/MSD81 (likely)
        
     
    
    
        
            Coolant Capacity:
        
        
            Approx. 8.5 Liters (17.9 US pints)
        
     
    
        
            Coolant Type:
        
        
            BMW Blue (G48 Ethylene Glycol based) or equivalent, mixed 50/50 with distilled water
        
     
 
    
    
    
        
            Type:
        
        
            6-speed Manual Transmission (Getrag GS6-37BZ)
        
     
    
    
        
            Type:
        
        
            6-speed Automatic Transmission with Steptronic (ZF 6HP19TU)
        
     
    
    
        
            Automatic Features:
        
        
            Steptronic manual shift mode, adaptive shift programs
        
     
    
    
        
            Automatic Fluid Type:
        
        
            BMW ATF 6 (Pentosin ATF1 or equivalent)
        
     
    
    
        
            Automatic Capacity:
        
        
            Approx. 9 Liters (for complete fluid exchange)
        
     
 
    
    
    
        
            Length:
        
        
            4451 mm (175.2 in)
        
     
    
    
        
            Height:
        
        
            1385 mm (54.5 in)
        
     
    
        
            Wheelbase:
        
        
            2660 mm (104.7 in)
        
     
    
    
        
            Curb Weight Manual:
        
        
            Approx. 1570 kg (3461 lbs)
        
     
    
        
            Curb Weight Automatic:
        
        
            Approx. 1585 kg (3494 lbs)
        
     
    
        
            Gross Vehicle Weight Rating:
        
        
            Approx. 2030 kg (4475 lbs)
        
     
    
        
            Payload Capacity:
        
        
            Approx. 460 kg (1014 lbs)
        
     
    
        
            Towing Capacity:
        
        
            Not Recommended
        
     
    
    
        
            Trunk Volume:
        
        
            Approx. 350 Liters (12.3 cu ft)
        
     
 
    
    
    
        
            NHTSA Overall Rating:
        
        
            Not specifically rated as a 135i Coupe for 2011, but 1-Series generally performed well in tests
        
     
    
        
            IIHS Ratings:
        
        
            Tested for front, side, and rear impacts; likely good ratings based on BMW's standards
        
     
    
    
        
            Traction Control:
        
        
            Dynamic Traction Control (DTC)
        
     
    
        
            Stability Control:
        
        
            Dynamic Stability Control (DSC) including ABS, ASC, CBC (Cornering Brake Control)
        
     
    
        
            Braking Assist:
        
        
            Brake Assist (BA)
        
     
    
    
        
            Airbags:
        
        
            Frontal airbags for driver and passenger, front side-impact airbags, front and rear head protection system (curtain airbags)
        
     
    
        
            Seat Belts:
        
        
            Three-point inertia-reel seat belts with automatic pre-tensioners and force limiters
        
     
    
        
            Child Restraints:
        
        
            ISOFIX/i-Size anchor points for child seats in rear seats
        
     
 
    
    
    
        
            System Name:
        
        
            iDrive System (CCC or CIC depending on options)
        
     
    
        
            Display Type:
        
        
            Central display screen, integrated into the dashboard
        
     
    
        
            Audio System:
        
        
            Standard BMW Professional Radio, optional Harman Kardon surround sound system
        
     
    
        
            Connectivity:
        
        
            Bluetooth (phone connectivity), USB interface (for audio and charging), optional satellite radio
        
     
    
    
        
            Parking Assist:
        
        
            Optional Park Distance Control (PDC) - front and rear sensors
        
     
    
        
            Lighting:
        
        
            Optional Xenon Adaptive Headlights
        
     
    
    
        
            Climate Control:
        
        
            Automatic climate control with dual-zone temperature settings
        
     
    
        
            Seats:
        
        
            Electrically adjustable sport seats with memory function (optional)
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Variable, indicated by Condition Based Service (CBS) system, typically 10,000-15,000 miles or annually.
        
     
    
        
            Brake Fluid Flush:
        
        
            Every 2 years, regardless of mileage.
        
     
    
        
            Spark Plug Replacement:
        
        
            Approximately 60,000 miles (N54 engine)
        
     
    
        
            Cabin Air Filter:
        
        
            Annually or every 15,000 miles
        
     
    
    
        
            Engine Oil Type:
        
        
            BMW Longlife-01 (LL-01) or Longlife-04 (LL-04) approved synthetic oil, typically 5W-30 or 0W-30.
        
     
    
        
            Engine Oil Capacity:
        
        
            Approx. 6.5 Liters (6.9 US quarts)
        
     
    
        
            Power Steering Fluid:
        
        
            BMW Power Steering Fluid (P/N 83 29 0 429 576) or Pentosin CHF 11S
        
     
    
    
        
            High Pressure Fuel Pump:
        
        
            N54 engines are known for potential High-Pressure Fuel Pump (HPFP) failures, leading to stalling or rough running.
        
     
    
        
            Turbocharger Wastegate Rattle:
        
        
            Wastegate rattle due to wear in the turbocharger actuators can occur.
        
     
    
        
            Ignition Coils And Spark Plugs:
        
        
            Premature failure of ignition coils and spark plugs can lead to misfires.
        
     
    
        
            Oil Pan Gasket Leaks:
        
        
            Leaking oil pan gasket can be a common issue with age.
        
     
 
    
    
    
        
            Brand Philosophy:
        
        
            Ultimate Driving Machine, focus on performance, engineering, and driver engagement
        
     
    
    
        
            1 Series Introduction:
        
        
            First generation 1 Series (E87 hatchback, E82 coupe, E88 convertible) launched in 2004, serving as BMW's entry-level premium vehicle.
        
     
    
        
            135I Introduction:
        
        
            The 135i variant was introduced to offer higher performance within the 1 Series range, leveraging BMW's renowned straight-six engines.
        
     
    
    
        
            Production Period E82:
        
        
            2007-2013
        
     
    
        
            Manufacturing Locations:
        
        
            Leipzig, Germany