WARNING: This page is about a different car, the 2021 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Due to the high moisture-absorption characteristics of the compressor oil, it may absorb moisture if left over a long period of time thereby negatively affecting A/C operation. Drain the compressor oil and refill within 10 min. of each other.
Be careful not to let foreign matter adhere to the thread and O-ring because the oil plug (with O-ring) removed in Step 1 is to be reused.
Be careful not to let foreign matter get inside the oil drained in Step 2 because the oil is to be added to the compressor again.

Remove the oil plug from the new A/C compressor and the old A/C compressor.

Fig 1: Oil Plug Bolt With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Drain the oil from the new A/C compressor into a clean measuring container.
Drain the oil from the old A/C compressor into a clean measuring container separate from the one used in Step 2.
Compare the amount of oil drained in Step 2 with the amount of oil drained in Step 3.

Adjust the oil drained in Step 2 so that it is the same amount as the oil drained from the old A/C compressor and add it into the new A/C compressor.

Courtesy of MAZDA MOTORS CORP.

COMPRESSOR OIL SPECIFICATION

Type	Sealed volume (Approx. quantity)
FD46XG	100 ml {100 cc, 3.38 US fl oz}

Install the oil plug.

When to See a Mechanic

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

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

A/C Compressor Installation Note

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?