Mazda CX-9 Grand Touring 2007 Manual page 196

7. Install the generator and A/C drive belt.
NOTE:
Fig. 4: Setting Breaker Bar On Center Of Tensioner Pulley
Courtesy of MAZDA MOTORS CORP.
8. Verify that the drive belt auto tensioner indicator mark is within the maximum and minimum belt length.
(See DRIVE BELT INSPECTION [MZI-3.5].)
If the drive belt auto tensioner indicator mark is not within the limit, replace the generator and A/C
drive belt.
9. Install the splash shield (RH).
10. Install the front wheel and tire (RH). (see GENERAL PROCEDURES (SUSPENSION). )
11. Install the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION [MZI-3.5].)
2007 Mazda CX-9 Grand Touring
2007 ENGINE Mechanical (MZI-3.5) - CX-9
When the generator and A/C drive belt is replaced with a new one, the
drive belt auto tensioner indicator mark is aligned with the nominal
belt length mark.