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How to Replace the Throttle Body in a Mazda 6

by Contributor

Since its debut in 2003, the Mazda 6 has managed to stand out among its competition in the mid-size sedan market. Introduced initially as a sedan, the Mazda 6 was offered as a hatchback and a wagon beginning in 2004. A four-cylinder engine provided 106 horsepower.

Remove the Throttle Body

Step 1

Make sure the engine is completely cool. Disconnect the battery ground and then isolate it to avoid accidental contact with the terminal while installing the throttle body.

Step 2

Drain the coolant from the engine. Store the coolant to be recycled in a sealable container.

Step 3

Take off the mud guard and the resonance chamber from the left front of the vehicle. Disconnect and then remove the sensors for the Intake Air Temperature and the Mass Airflow.

Step 4

Pull the vacuum hose from the purge solenoid valve. Take off the air hose and the water hose.

Remove the fasteners that secure the throttle body in place. Lift the throttle body from the manifold. Take out the gasket and throw it away.

Install the Throttle Body

Step 1

Clean all traces of old gasket material, debris and carbon deposits from the gasket mating surfaces. Position a new gasket on the throttle body.

Step 2

Set the new throttle body in place. Tighten the fasteners.

Step 3

Refill the cooling system with an appropriate type and mix of coolant. Reconnect the battery ground cable.

Start the engine and test the system for leaks of coolant or vacuum. Make the necessary adjustments. Re-check the coolant level and add as needed.


  • Vacuum hoses slide onto fittings or connectors that grip the individual hose and hold it in place. No special tools are required to remove or reconnect vacuum hoses. Label the hose and its connection before separating.
  • Place a clean shop cloth over the opening to the manifold to prevent dirt from falling into the engine.


  • Dogs and cats will drink coolant left in open containers or on the floor and ingestion is usually fatal. Reuse coolant unless it is contaminated or old.
  • Never smoke or expose an open flame of any kind to the area near fuel-related engine parts.

Items you will need

  • Mechanic's toolset, including a full socket set, wrenches, screwdrivers
  • Torque wrench
  • Replacement gasket
  • Clean shop cloths
  • Plastic scraper
  • Coolant

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