🏷️ Basic Information

Make:

Toyota

Model:

Sienna

Year:

2003

Chassis Code:

XL20

👋 Introduction

Segment:

Mid-size Minivan

Competitors:

Honda Odyssey, Dodge Grand Caravan, Ford Windstar, Chrysler Town & Country

Unique Selling Points:

Known for Toyota's reliability, comfortable ride, versatile interior, available AWD, and family-friendly features.

Benefit To Owner:

Enables DIY repairs and maintenance, saving money on labor costs and providing a deeper understanding of vehicle operation and repair.

Provider:

RepairSurge (Licensed OE Materials)

📋 Manual Details

Geographic Coverage:

North America (primarily)

Estimated Page Count:

1500+

Type:

Factory-Derived Service and Repair Manual

Language:

English

Format:

PDF Download (Digital Access via Web Browser)

📖 Manual Coverage

Powertrain:

Engine, Transmission, Drivetrain (including FWD and AWD components)

Chassis:

Suspension, Steering, Brakes (including ABS), Wheels, Tires

Body And Interior:

Body Panels, Doors, Windows, Seats, Trim, HVAC System

Electrical:

Wiring Diagrams, Lighting, Ignition, Starting, Charging, Instrumentation, Audio System, Power Accessories, Security System

Diagnostics And Troubleshooting:

Diagnostic Trouble Codes (DTCs), Symptoms, Causes, Repair Procedures

Maintenance:

Scheduled Maintenance, Fluid Checks and Changes, Filter Replacements, Lubrication

Repair:

Component Removal, Installation, Adjustment, Overhaul

Troubleshooting:

System-Specific Diagnosis, Fault Finding Flowcharts

Specifications:

Torque Specifications, Clearances, Fluid Capacities, Electrical Specifications

Wheel Alignment:

Specifications and procedures for front and rear wheel alignment.

Exhaust System:

Repair and replacement procedures for exhaust components.

Cooling System:

Radiator, water pump, thermostat, heater core, and coolant flow diagnostics and repair.

Fuel System:

Fuel pump, fuel filter, fuel injectors, fuel pressure testing, and evaporative emissions control (EVAP) system.

Air Conditioning And Heating:

Refrigerant handling (with safety precautions), A/C compressor, condenser, evaporator, blower motor, and control head diagnostics and repair.

Body And Paint:

Panel removal and installation, door mechanisms, glass replacement, and basic body repair information.

Depth:

Comprehensive: Covers everything from basic maintenance and routine service to advanced diagnostics, component-level repairs, and complete system overhauls. Includes detailed explanations, diagrams, and step-by-step instructions.

Diagnostic Tools:

Information on using OBD-II scanners, specific Toyota diagnostic tools (e.g., Techstream, though not directly covered in the manual itself, common DTCs are listed).

📊 Manual Specifications

File Type:

PDF

Resolution:

High-resolution, suitable for printing specific pages or the entire manual.

Binding:

N/A (Digital Download)

Paper Quality:

N/A (Digital Download)

Text Searchability:

Yes (Searchable text within the PDF document)

⚙️ Engine Specifications

Engine Type:

3.3L V6 DOHC 24-Valve

Engine Code:

3MZ-FE

Horsepower:

182 hp @ 5200 rpm

Torque:

209 lb-ft @ 3800 rpm

Fuel Delivery:

Electronic Fuel Injection (EFI)

Recommended Fuel:

87 Octane Unleaded Gasoline

Bore X Stroke:

92.0 mm x 82.0 mm

Compression Ratio:

9.8:1

Valve Train:

Dual Overhead Camshafts (DOHC), 4 Valves per Cylinder, VVT-i (Variable Valve Timing with intelligence)

Timing Mechanism:

Timing Chain (Dual chain setup)

🔧 Transmission

Type:

4-speed Automatic Electronically Controlled with Overdrive (ECT)

Type:

All-Wheel Drive (AWD)

Transmission Control:

Electronic control with adaptive shift logic.

Transmission Fluid Type:

Toyota ATF WS (World Standard) or equivalent DEXRON III/MERCON compatible fluid (refer to manual for precise specification)

📐 Dimensions

Length:

199.2 inches

Width:

77.4 inches

Height:

67.9 inches

Wheelbase:

119.3 inches

Curb Weight:

4,265 - 4,500 lbs (approximate, depending on configuration)

Cargo Volume Behind 3Rd Row:

28.2 cu ft

Cargo Volume Behind 2Nd Row:

85.1 cu ft

Cargo Volume Behind 1St Row:

144.9 cu ft

🛡️ Safety Features

NHTSA Front Impact:

5-Star (Driver), 4-Star (Passenger)

NHTSA Side Impact:

4-Star (Front), 5-Star (Rear)

IIHS Front Crashworthiness:

Good

ABS:

Standard Anti-lock Braking System

Traction Control:

Available Traction Control System (TRAC)

Electronic Stability:

Available Electronic Stability Control (VSC - Vehicle Stability Control)

Airbags:

Driver and front passenger airbags, available front side-impact airbags.

Seatbelts:

Three-point seatbelts for all seating positions, pretensioners with force limiters for front seats.

💡 Technology Features

Audio System:

AM/FM/CD player, optional JBL premium audio system, available rear-seat entertainment system.

Navigation:

Optional factory navigation system.

Cruise Control:

Standard Cruise Control

Power Accessories:

Power windows, power door locks, power sliding doors (on some trims), power liftgate (on some trims).

🔧 Maintenance

Oil Change Interval:

Every 5,000 miles or 6 months, whichever comes first (or 10,000 miles with synthetic oil, consult manual for details).

Engine Air Filter:

Replace every 30,000 miles (inspect more frequently).

Cabin Air Filter:

Replace every 15,000 miles (inspect more frequently).

Spark Plugs:

Replace every 100,000 miles (Iridium-tipped spark plugs).

Engine Oil Type:

API SL/SM certified, SAE 5W-30 (synthetic recommended for extended intervals)

Engine Oil Capacity:

4.5 US quarts (with filter) for 3MZ-FE engine

Coolant Type:

Toyota Super Long Life Coolant (SLLC) or equivalent ethylene glycol-based coolant, pre-diluted 50/50 with distilled water.

Brake Fluid Type:

SAE J1703 or FMVSS No. 116 DOT 3

Power Steering Fluid Type:

Genuine Toyota Power Steering Fluid or Dexron III/Mercon compatible fluid.

Common Complaints:

Intermittent ABS warning light (often due to ABS accumulator failure or faulty wheel speed sensors), front brake wear, occasional transmission shifting issues, aging suspension components (bushings, struts).

Potential Repairs:

Replacement of ABS accumulator, wheel speed sensors, brake pads/rotors, strut assemblies, control arm bushings.

📚 Vehicle History

Brand Reputation:

Toyota is renowned globally for its reliability, durability, and quality manufacturing.

Generation:

First Generation (1998-2003)

Key Changes For 2003:

Minor styling updates, improved interior materials, optional VSC and TRAC enhancements.

Manufacturing Location:

Georgetown, Kentucky, USA (Toyota Motor Manufacturing Kentucky, Inc.)

🏆 Awards & Recognition

Previous Awards:

While specific awards for the 2003 model year are less publicized, the Sienna consistently ranked high for family-friendliness and practicality in reviews from automotive publications of its era.