Engine Mechanical:
Complete overhaul, inspection, repair, timing chain, VANOS, valvetronic, lubrication system, cooling system
Engine Management:
Fuel injection, ignition system, sensors (MAF, O2, crank, cam), ECU diagnostics, emissions control (catalytic converter, EVAP)
Transmission Manual:
Clutch replacement, gearbox overhaul, shift mechanism, gear ratios
Transmission Automatic:
ZF 6HP19/6HP26 service, torque converter, mechatronics, fluid changes, diagnostics
Drivetrain:
Driveshafts, constant velocity joints (CV joints), differentials, rear axle assembly
Suspension:
Front and rear suspension components (struts, shock absorbers, control arms, ball joints, bushings), alignment specifications
Steering:
Power steering system (hydraulic pump, rack and pinion, steering column), electric power steering (EPS) components (if applicable to later models within range)
Brakes:
Hydraulic system, ABS, DSC (Dynamic Stability Control), EBD, brake pads, rotors, calipers, bleeding procedures, parking brake
Electrical System:
Battery, alternator, starter motor, wiring diagrams, fuses, relays, lighting (headlights, taillights, interior), power windows, mirrors
Bodywork:
Body panel removal/installation, door mechanisms, hood, trunk, bumper repair, rust prevention, paint codes
Climate Control:
HVAC system, A/C compressor, refrigerant, blower motor, climate control module, cabin filter replacement
Interior:
Seat removal, dashboard disassembly, trim panel replacement, airbag system precautions
Diagnostics Troubleshooting:
OBD-II codes, fault finding procedures, diagnostic tool usage, component testing
Routine Maintenance:
Oil and filter changes, air filter replacement, spark plug replacement, fluid checks and top-offs
Component Replacement:
Headlight bulbs, wiper blades, battery, belts, hoses, brake pads, rotors, exhaust components
Engine Repair:
Head gasket replacement, piston ring replacement, valve seal replacement, timing chain guide replacement
Transmission Repair:
Clutch assembly replacement, automatic transmission fluid and filter service, valve body repair
Suspension Repair:
Control arm bushing replacement, ball joint replacement, shock absorber and strut replacement
Brake System Repair:
Brake caliper rebuilding, brake line replacement, ABS sensor replacement
Electrical Diagnostics:
Wiring harness repair, component testing with multimeter, diagnosing electrical faults
Air Conditioning Service:
Refrigerant recharging, leak detection, compressor replacement
Body Panel Repair:
Dent repair, panel alignment, rust removal and treatment
Wheel Alignment:
Torque specifications for alignment bolts, camber, caster, toe adjustments
Depth Level:
Comprehensive (from basic maintenance to full engine and transmission rebuilds)
Diagnostic Focus:
Detailed diagnostic procedures for all major systems, including specific fault codes and troubleshooting trees
Repair Instructions:
Step-by-step repair instructions with detailed diagrams and torque specifications
Oil Change Interval:
Variable valve timing system (Condition Based Service) typically 10,000-15,000 miles or annually
Spark Plug Replacement:
Approx. 60,000 miles (Long-life spark plugs)
Cabin Air Filter:
Every 15,000-30,000 miles or annually
Brake Fluid Flush:
Every 2 years (regardless of mileage)
Engine Oil Capacity:
Approx. 6.5 liters (6.9 US quarts) with filter
Engine Oil Type:
SAE 0W-30 Synthetic (BMW LL-01 approved)
Coolant Capacity:
Approx. 8.0 liters (8.5 US quarts)
Brake Fluid Type:
DOT 4 (BMW High Performance DOT 4 or equivalent)
Engine Common Problems:
Oil leaks (valve cover gasket, oil pan gasket), VANOS solenoids failure, water pump failure, ignition coil failure, oil separator (OCV) issues
Cooling System Common Problems:
Plastic coolant expansion tank cracking, thermostat housing leaks, frequent water pump failures (especially earlier models)
Electrical Common Problems:
Window regulator failures, headlight condensation, stepper motor failures in HVAC
Suspension Common Problems:
Control arm bushings wear, shock absorber leaks, rear subframe bushing separation (less common on E90 than E46)
Transmission Common Problems:
Automatic transmission mechatronics issues, torque converter shudder (ZF transmissions), clutch wear (manual transmissions)