Contents

Toyota 2003 4Runner Through Oct. 2002 Prod. Owner's Manual (OM35795U)
- Foreword
  - Important information about this manual
  - Important information about your Toyota
- 1. OPERATION OF INSTRUMENTS ANDCONTROLS
  - 1-1 Overview of instruments and controls
  - 1-2 Keys and Doors
  - 1-3 Seats, Seat belts, Steering wheel and Mirrors
  - 1-4 Lights, Wipers and Defogger
  - 1-5 Gauges, Meters and Service reminder indicators
  - 1-6 Ignition switch, Transmission and Parking brake
  - 1-7 Car audio system
  - 1-8 Air conditioning system
  - 1-9 Other equipment
- 2. INFORMATION BEFORE DRIVING YOURTOYOTA
- 3. STARTING AND DRIVING
- 4. IN CASE OF AN EMERGENCY
- 5. CORROSION PREVENTION ANDAPPEARANCE CARE
- 6. VEHICLE MAINTENANCE AND CARE
- 7. DOITYOURSELF MAINTENANCE
  - 7-1 Introduction
  - 7-2 Engine and Chassis
  - 7-3 Electrical components
- 8. SPECIFICATIONS
- 9. REPORTING SAFETY DEFECTS FOR U.S.OWNERS AND UNIFORM TIRE QUALITYGRADING

Toyota 4Runner 2003 Owner's Manual

Pages 373

Year 2003

Language(s)

of 373

Toyota 4Runner 2003 SUV Specification

The 2003 Toyota 4Runner is a mid-sized SUV known for its robust build quality, off-road capabilities, and reliable performance. It features a body-on-frame construction, which enhances its durability and ruggedness, making it suitable for both urban commuting and adventurous terrains. The vehicle is powered by a choice of two engines: a 4.0-liter V6 engine that produces 245 horsepower and 282 lb-ft of torque, or a 4.7-liter V8 engine that delivers 235 horsepower and 320 lb-ft of torque. Both engines are paired with a 4-speed automatic transmission, providing smooth and responsive gear shifts.

The 2003 4Runner offers rear-wheel drive as standard, with an optional full-time four-wheel-drive system for enhanced traction and stability in various driving conditions. The suspension system includes an independent double-wishbone front suspension and a solid rear axle with coil springs, contributing to a comfortable ride and impressive off-road performance. The vehicle’s ground clearance is approximately 9.1 inches, allowing it to navigate rough terrains with ease.

Inside, the 4Runner accommodates up to five passengers with ample headroom and legroom. The interior features durable materials and practical design elements, including a versatile cargo area with a split-folding rear seat to expand storage capacity. Standard features include air conditioning, power windows and locks, and a CD player, while higher trims offer additional amenities such as leather upholstery, a premium audio system, and a power moonroof.

Safety features in the 2003 4Runner include anti-lock brakes, electronic brake-force distribution, and optional side curtain airbags. The vehicle's robust frame and advanced safety systems contribute to its solid safety ratings. Overall, the 2003 Toyota 4Runner combines reliability, versatility, and off-road prowess, making it a popular choice among SUV enthusiasts.

Toyota 4Runner 2003 SUV F.A.Q.

How do I reset the maintenance light on a 2003 Toyota 4Runner?

Turn the ignition key to the "ON" position without starting the engine. Set the odometer to "ODO" mode. Turn the ignition off. While holding the trip meter reset button, turn the ignition back to the "ON" position. Hold the button until the maintenance light turns off.

What is the recommended tire pressure for a 2003 Toyota 4Runner?

The recommended tire pressure for the 2003 Toyota 4Runner is typically 32 psi for both front and rear tires. Always check the owner's manual or the sticker on the driver's side door jamb for confirmation.

How can I troubleshoot if my 4Runner's air conditioning is not blowing cold air?

First, check if the AC refrigerant level is adequate. Then, inspect the AC compressor, belts, and fuses for any visible issues. If these seem fine, it might be best to consult a professional for a detailed diagnostic.

What type of engine oil is best for a 2003 Toyota 4Runner?

For optimal performance, use 5W-30 engine oil. Ensure it meets API certification standards. Always refer to the owner's manual for specifications.

How do I replace the headlight bulb on a 2003 Toyota 4Runner?

Open the hood and locate the back of the headlight assembly. Disconnect the power connector from the bulb. Remove the rubber cover and unclip the bulb holder. Replace the old bulb with a new one, ensuring it is securely fastened. Reattach the rubber cover and power connector.

What should I do if my 2003 4Runner is experiencing poor fuel economy?

Check the air filter and replace if dirty. Ensure tires are properly inflated. Inspect spark plugs and replace if worn. Consider using a fuel injector cleaner. Regular maintenance and timely oil changes can also improve fuel efficiency.

How do I jump-start a 2003 Toyota 4Runner?

Park a functioning vehicle close to the 4Runner without touching. Connect the red jumper cable to the positive terminal of the 4Runner's battery and the other end to the positive terminal of the assisting vehicle's battery. Connect the black cable to the negative terminal of the assisting vehicle and the other end to a metal ground on the 4Runner. Start the assisting vehicle, then attempt to start the 4Runner. Once started, remove cables in reverse order.

How can I fix a leaking sunroof on my 2003 4Runner?

Inspect the sunroof's drainage channels for clogs and clear any debris. Check the rubber seals for wear or damage and replace if necessary. If leaks persist, consider consulting a professional for further inspection.

What is the towing capacity of a 2003 Toyota 4Runner?

The 2003 Toyota 4Runner typically has a towing capacity of up to 5,000 pounds, depending on the engine and configuration. Always consult the owner's manual for specific towing guidelines and ensure the towing setup complies with safety standards.

How can I improve the suspension performance of my 2003 Toyota 4Runner?

Consider upgrading to higher-quality shocks and struts. Regularly inspect and replace worn suspension components such as bushings and control arms. Aligning the wheels and maintaining proper tire pressure can also enhance suspension performance.