Positioning:
Performance-oriented compact luxury coupe/convertible, competing with Mercedes-Benz C-Class Coupe, Audi A3 Sedan/Cabriolet, Infiniti G37 Coupe/Convertible
Key Differentiators:
Powerful twin-turbocharged engine, RWD platform, sport-tuned suspension, premium interior, BMW driving dynamics
Vehicle Highlights:
Powerful N54 engine, agile handling, driver-focused cockpit, available manual transmission, stylish design
Coverage Scope:
Comprehensive service, repair, and maintenance
Estimated Page Count:
Extensive (software-based, not limited by physical pages)
Type:
Service and Repair Manual Software
Format:
Digital Software (likely PDF or proprietary interactive format)
Engine Systems:
N54 twin-turbocharged inline-6, fuel injection, ignition, cooling, lubrication, exhaust, emissions
Transmission Systems:
ZF 6-speed manual (GS6-37BZ), optional 6-speed automatic (GM 6L45) - diagnostics, repair, fluid specifications
Drivetrain Systems:
Rear-wheel drive, differential, driveshafts, axles
Suspension Systems:
Front MacPherson struts, rear multi-link, steering system, wheel alignment
Braking Systems:
Front and rear disc brakes, ABS, DSC (Dynamic Stability Control), brake fluid specifications
Electrical Systems:
Battery, charging system, starter, lighting, fuses, relays, body control module (BCM), instrument cluster
Body And Interior:
Body panels, doors, windows, seats, HVAC, interior trim, convertible top mechanisms (E88)
Diagnostics And Troubleshooting:
Fault codes (DTCs), diagnostic procedures, sensor testing, system analysis
Maintenance Procedures:
Oil changes, filter replacements, spark plug replacement, brake service, fluid checks and top-offs
Repair Procedures:
Engine component replacement, transmission overhaul, suspension component replacement, brake caliper replacement, electrical component diagnosis and replacement
Troubleshooting Guides:
Step-by-step diagnostic workflows for common and complex issues
Technical Specifications Data:
Torque specifications, clearances, fluid capacities, electrical schematics, component data
Depth:
Professional-level diagnostic and repair information, suitable for independent technicians and advanced DIY enthusiasts
Engine Type:
Inline 6-cylinder, Twin-Turbocharged
Displacement:
2979 cc (3.0 Liters)
Bore X Stroke:
84.0 mm x 89.6 mm
Compression Ratio:
10.2:1
Horsepower:
300 hp @ 5800 rpm
Torque:
300 lb-ft @ 1400-5000 rpm
Fuel Delivery:
Direct Injection (High-Pressure Fuel System)
Fuel Type:
Premium Unleaded Gasoline (91+ Octane Recommended)
Transmission Type:
6-Speed Manual (GS6-37BZ)
Transmission Type:
6-Speed Automatic (GM 6L45)
Manual Transmission Features:
Short-throw shifter, performance clutch
Automatic Transmission Features:
Steptronic paddle shifters (optional)
Length:
Coupe: 172.2 in, Convertible: 172.2 in
Width:
Coupe: 69.9 in, Convertible: 69.9 in
Height:
Coupe: 54.7 in, Convertible: 55.5 in
Curb Weight:
Coupe Manual: ~3470 lbs, Coupe Auto: ~3550 lbs, Convertible Manual: ~3835 lbs, Convertible Auto: ~3925 lbs
Trunk Volume:
Coupe: 12.0 cu ft, Convertible: 8.5 cu ft (with top up)
NHTSA Overall Rating:
Not explicitly rated for 2009 model year by NHTSA in a unified score, but component testing available.
Active Safety Systems:
Dynamic Stability Control (DSC), Anti-lock Braking System (ABS), Dynamic Traction Control (DTC), Electronic Differential Lock (EDL equivalent)
Passive Safety Systems:
Front airbags, side-impact airbags, front and rear head protection system (curtain airbags), active front head restraints, three-point seat belts with pretensioners, rollover protection system (Convertible)
Infotainment System:
iDrive system (CCC or CIC depending on options), optional navigation, Bluetooth, USB interface, CD player.
Driver Assistance Features:
Parking Distance Control (PDC), Bi-Xenon Adaptive Headlights, Rain-sensing wipers, Automatic climate control.
Connectivity Options:
Bluetooth hands-free calling, optional USB audio interface.
Oil Change Interval:
Condition-based (BMW Service Indicator), typically 10,000-15,000 miles or annually. Consult manual for exact trigger conditions.
Spark Plug Replacement:
N54 engine often recommends replacement around 60,000 miles. Consult manual for specific interval.
Brake Fluid Flush:
Every 2 years, regardless of mileage.
Coolant Replacement:
Typically first replacement at 100,000 miles, then every 50,000 miles. BMW utilizes long-life coolant.
Engine Oil:
BMW Longlife-01 (LL-01) or Longlife-01 FE (LL-01 FE) approved synthetic oil, typically 5W-30 or 0W-30.
Transmission Fluid Manual:
Refer to manual for specific gear oil specification (e.g., MTF LT-2).
Transmission Fluid Automatic:
Refer to manual for specific ATF specification (e.g., Esso LT 71141 or equivalent for GM 6L45).
Brake Fluid:
DOT 4 (BMW recommends Brake Fluid P/N 82 11 1 468 027).
Coolant:
BMW Blue Antifreeze/Coolant (G48) or equivalent.
Common Wear Items:
Water pump (especially electric on N54), HPFP (High-Pressure Fuel Pump) failures, ignition coils, fuel injectors, turbocharger wastegate rattle, oil filter housing gasket leaks, vacuum line issues.
Performance Enhancement Considerations:
N54 is highly tunable; however, upgrades often necessitate addressing fuel system (injectors, pump) and cooling system limitations.
Bmw Legacy:
Longstanding reputation for performance, luxury, and driving dynamics ('The Ultimate Driving Machine').
1 Series Introduction:
First generation (E81/E82/E87/E88) introduced in 2004. The 135i variant, powered by the potent N54 engine, was introduced in 2008.
Manufacturing Location:
Leipzig, Germany
Model Year Production:
2008-2010 (for the E82/E88 135i)
