Positioning:
The 2003 Nissan Maxima, often referred to as the 'four-door sports car,' aimed to provide a blend of luxury, performance, and practicality in the mid-size sedan segment.
Competitors:
Competed against vehicles like the Toyota Avalon, Honda Accord V6, and Acura TL.
Vq35De Engine:
The 3.5L VQ35DE V6 engine was a key selling point, renowned for its smooth power delivery and robust performance.
Premium Appointments:
Offered upscale interior features and a comfortable ride, distinguishing it from more mainstream sedans.
Value Proposition:
Provides authorized, accurate, and up-to-date information from OE sources, ensuring correct repairs and maintenance, saving owners significant costs compared to dealership service.
Engine Mechanical:
Engine assembly, cylinder head, block, pistons, crankshaft, camshafts, valve train, lubrication system, cooling system.
Engine Performance:
Fuel delivery, ignition system, emission control systems, engine control module (ECM) diagnosis, engine tuning.
Transmission Drivetrain:
Automatic transmission (RE4F04B), manual transmission (optional, less common for this generation), torque converter, driveshafts, axles, differentials.
Brakes:
Hydraulic system, brake boosters, master cylinder, calipers, rotors, pads, anti-lock braking system (ABS), electronic brake-force distribution (EBD).
Suspension Steering:
Front and rear suspension components (struts, springs, control arms, bushings), power steering system, steering rack, steering column.
Electrical Electronics:
Wiring diagrams, lighting system, battery, charging system (alternator), starting system, power distribution, fuses, relays, body control module (BCM).
HVAC:
Heating, ventilation, and air conditioning (HVAC) system, refrigerant, compressor, evaporator, condenser, climate control unit.
Body Chassis:
Body panels, doors, windows, locks, exterior trim, interior trim, structural components.
Diagnostics Troubleshooting:
Diagnostic trouble codes (DTCs), troubleshooting flowcharts, component testing procedures.
Maintenance:
Scheduled maintenance (oil changes, filter replacements, fluid checks), spark plug replacement, belt inspection/replacement, brake pad replacement, fluid flushes.
Repair:
Engine component replacement (e.g., water pump, thermostat, fuel injectors), transmission fluid/filter service, brake caliper replacement, suspension component replacement (e.g., ball joints, tie rod ends), alternator replacement, starter motor replacement.
Diagnostics:
Step-by-step diagnostic procedures for various drivability and electrical issues, using scan tools and multimeters.
Special Tools:
Identification and usage of specialized tools required for specific repair procedures.
Depth:
Full factory-level repair and diagnostic information, suitable for professional technicians and advanced DIYers. Covers everything from basic maintenance to complete engine and transmission overhauls.
NHTSA Front Impact:
5-Star Driver and Passenger (2003 Model Year)
IIHS Side Impact:
Good (based on similar generation data, specific '03 Maxima may vary)
ABS:
Standard Anti-lock Braking System (ABS)
Ebd:
Standard Electronic Brake-force Distribution (EBD)
Traction Control:
Optional Traction Control System (TCS) on some trims.
Airbags:
Front dual-stage airbags, front side-impact airbags (standard on most trims).
Seatbelts:
Three-point seat belts with pretensioners and load limiters.
Oil Change Interval:
Every 3,750 to 7,500 miles (6,000 to 12,000 km), or 6 months, depending on driving conditions and oil type used. Refer to manual for specifics.
Air Filter Replacement:
Approximately every 15,000 to 30,000 miles (24,000 to 48,000 km).
Spark Plug Replacement:
Typically around 100,000 miles (160,000 km) for Iridium-tipped spark plugs.
Engine Oil Capacity:
4.8 US quarts (4.5 liters) with filter change (VQ35DE).
Coolant Type:
Nissan Genuine Super Long Life Coolant (Blue) or equivalent P-HOAT coolant.
Brake Fluid Type:
DOT 3 or DOT 4.
ABS Sensor Failure:
Wheel speed sensor failures can cause ABS warning lights and system malfunctions.
Evaporator Core Leaks:
HVAC evaporator core leaks can lead to loss of A/C refrigerant and potential water intrusion into the cabin.
Power Steering Leaks:
Common issues with power steering hoses and seals can lead to leaks and system noise.
Transmission Control Module (Tcm):
Occasional TCM issues can manifest as erratic shifting or limp mode.
Belt Maintenance:
Regularly inspect the serpentine belt for wear, cracks, and proper tension. Consider replacement around 60,000 miles.
