A/C Unit Installation Note

WARNING: This page is about a different car, the 2007 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

When replacing the A/C unit or evaporator, add compressor oil to the refrigerant cycle.
Supplemental oil amount (approx. quantity) 25 ml {25 cc, 0.8 fl oz}
Tighten the A/C unit adjusting bolt until it lightly touches the A/C unit.

Fig 1: Identifying A/C Unit Adjusting Bolt
Courtesy of MAZDA MOTORS CORP.