Throttle Body: Installation

2004 Toyota Matrix XR, FWD, StandardSECTION Installation
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2000 Lexus SC 400, 2000 Lexus SC 300, 2000 Lexus RX 300, 2000 Lexus LX 470, and 2000 Lexus LS 400. However, it is still accessible from the selected car via links, so may be relevant.

Using compressed air, clean all passages. Clean throttle body gasket surfaces. Install NEW gaskets, "O" rings and throttle bodies. See Figure. Tighten throttle body screws to specification. See TORQUE SPECIFICATIONSΒ . To complete installation, reverse removal procedure. Fill cooling system with proper mix of water and coolant. If throttle body assemblies were removed from intake air control valve, throttle body lever adjustment may be necessary. See THROTTLE BODY LEVER ADJUSTMENT in ON-VEHICLE ADJUSTMENTS article.



To install, reverse removal procedure using NEW gaskets. Tighten bolts/nuts to specification. See TORQUE SPECIFICATIONSΒ . If using original hose clamps on water by-pass hoses, install hose clamps as illustrated. See Fig 4. Fill cooling system.

Fig 1: Accelerator Position Sensor Retaining Screw Installation Sequence & Positioning Of Tabs On Washer Plate (GS300 & SC300)
G98J11907Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.