Engine Mechanical:
Engine assembly, cylinder heads, crankshaft, pistons, connecting rods, timing system, lubrication system.
Engine Electrical:
Ignition system, starting systems, charging systems, engine control module (ECM) diagnostics, sensors, actuators.
Transmission:
42LE automatic transaxle: overhaul, diagnostics, torque converter, valve body, solenoids, electronic controls.
Brakes:
Hydraulic system, ABS (Anti-lock Braking System), traction control, brake rotors, pads, calipers, lines, master cylinder, power booster.
Suspension:
Front suspension (struts, control arms, ball joints), rear suspension (multi-link, control arms, bushings), wheel bearings, alignment.
Steering:
Power steering system, steering gear/rack, tie rod ends, steering column, power steering pump and fluid.
Cooling System:
Radiator, water pump, thermostat, hoses, coolant, cooling fan operation, temperature sensor.
Fuel System:
Fuel pump, fuel filter, fuel injectors, fuel pressure regulator, fuel tank, evaporative emission control (EVAP).
Exhaust System:
Exhaust manifolds, catalytic converter, mufflers, pipes, hangers, oxygen sensors.
Body:
Body construction, panels, doors, hood, trunk, glass, seals, frame and bumper repair.
HVAC:
Heating and air conditioning system, refrigerant, compressor, condenser, evaporator, blower motor, HVAC controls, climate control diagnostics.
Electrical Distribution:
Power distribution systems, fuses, relays, battery, starter, alternator, wiring harness routing.
Instrument Panel:
Instrument cluster, gauges, warning lights, diagnostic connectors (OBD-II).
Audio Systems:
Factory radio, speakers, amplifiers, antenna systems, diagnostics.
Lighting:
Headlamps, tail lamps, interior lamps, fog lamps, bulb replacement, wiring.
Comfort Convenience:
Power windows, power locks, power mirrors, power seats, sunroof operation, keyless entry, remote functions.
Safety Restraint:
Airbag system (SRS), seat belts, occupant restraint systems, diagnostic procedures for SRS.
Wipers Washers:
Wiper motor, linkage, blades, washer pump, fluid reservoir, controls.
Cruise Control:
Vehicle speed control system components, sensors, actuators, and diagnostics.
Security Theft:
Vehicle theft/security systems, immobilizer, alarm system operation and diagnostics.
Chimes Buzzers:
Chime/buzzer warning systems for door ajar, seat belt reminders, etc.
Overhead Console:
Overhead console systems, including map lights, sunroof controls, trip computers, if equipped.
Emission Control:
Emission control systems, catalytic converters, EGR, PCV, evaporative emission controls, oxygen sensors.
Electrically Heated:
Electrically heated systems, such as heated mirrors, heated seats, rear defogger.
Maintenance Procedures:
Routine maintenance, oil changes, filter replacements, fluid checks, tire rotation, spark plug replacement.
Diagnostic Procedures:
Troubleshooting guides, symptom-based diagnostics, diagnostic trouble codes (DTCs) interpretation, specific component testing.
Repair Procedures:
Step-by-step instructions for component removal, installation, and repair, including engine, transmission, brakes, suspension, and body.
Wiring Diagrams:
Detailed electrical schematics for all vehicle systems, including harness routing, connector pinouts, and component locations.
Special Tools:
Identification and usage of special tools required for specific repair procedures.
Technical Depth:
Comprehensive, covering everything from basic lubrication to full engine and transmission overhauls, including electrical system diagnostics and body repair.
Oil Change Interval:
Typically every 7,500 miles (12,000 km) or 6 months, using synthetic blend or full synthetic oil, or as per severe service schedule (e.g., 3,750 miles).
Transmission Fluid Change:
Recommended every 60,000-100,000 miles (96,000-160,000 km), or more frequently under severe driving conditions. Refer to manual for exact interval and procedure.
Coolant Change:
Initial change at 100,000 miles (160,000 km), then every 50,000 miles (80,000 km) thereafter. Use Mopar OAT coolant or equivalent.
Engine Oil Specification:
SAE 5W-30. Check owner's manual for specific recommendations and API service classification.
Power Steering Fluid:
Chrysler Power Steering Fluid or Mopar Power Steering Fluid.
Common Wear Items:
Upper strut mounts, sway bar links and bushings, control arm bushings, power steering pump leaks, window regulator failures, intake manifold gasket leaks (on earlier LH models, less common on the 300M).
Transaxle Issues:
The 42LE can be prone to solenoid issues, torque converter clutch (TCC) shudder, and potential failure of the internal pump or clutches if not properly maintained.
Electrical Issues:
Intermittent electrical gremlins related to body control modules, instrument cluster, or door lock actuators can occur.