Mazda 3 Quiz
Engine

Drive Belt Auto Tensioner Inspection [Mzr 2.0, Mzr 2.5]

In this manual: Engine
Vehicle general — 15Accessories — 111Body — 339Brakes — 71Drivetrain — 143Electrical — 58Engine — 251HVAC — 72Restraints — 15Steering — 32Suspension — 41
~1min read
MZR 2.0

1. Remove the generator drive belt with the A/C drive belt still installed and set it out of the way..

2. Verify that the drive belt auto tensioner moves smoothly in the operational direction.


  • If it does not move smoothly, replace the drive belt auto tensioner..

3. Turn the drive belt auto tensioner pulley by hand and verify that it rotates smoothly.

  • If it does not move smoothly, replace the drive belt auto tensioner..

4. Install the generator drive belt..

MZR 2.5

1. Remove the drive belt..

2. Verify that the drive belt auto tensioner moves smoothly in the operational direction.


  • Replace the drive belt auto tensioner if necessary..

3. Rotate the drive belt auto tensioner pulley by hand and verify that it rotates smoothly.

  • Replace the drive belt auto tensioner if necessary..

4. Install the drive belt..

Test yourself

A quick Mazda 3 quiz: every answer comes with an explanation and a link to the manual page.