🔧 CX-5 - A/C Compressor Replacement

Replacing the A/C compressor on your CX-5 involves safely recovering the refrigerant, removing the drive belt and refrigerant lines, swapping the compressor, then vacuuming and recharging the system to the correct amount. This is important because opening the A/C system lets moisture in, and moisture can damage the new compressor fast.

Difficulty Level: Advanced | Estimated Time: 3-6 hours

---

⚠️ Safety & Precautions

• ⚠️ Refrigerant must be recovered with proper equipment—do not vent to the air.
• ⚠️ Wear eye protection and gloves; liquid refrigerant can cause frostbite.
• ⚠️ Keep hands/clothes away from pulleys and the belt path.
• ⚠️ Support the CX-5 on jack stands; never rely on a floor jack alone.
• ⚠️ Disconnect the negative battery terminal before unplugging the compressor connector.
• ⚠️ Cap/plug A/C lines immediately to keep dirt and moisture out.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Metric socket set 8mm-19mm
• 3/8" drive ratchet
• 3/8" drive torque wrench (10-80 Nm range)
• Extensions (3" and 6")
• Serpentine belt tool or long 14mm wrench
• Trim clip removal tool
• Flathead screwdriver
• Pick tool
• Line caps/plugs assortment
• A/C manifold gauge set for R-134a
• Vacuum pump (specialty)
• Refrigerant recovery machine (specialty)
• Refrigerant scale (specialty)

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• A/C compressor - Qty: 1
• A/C compressor clutch/pulley assembly - Qty: 1 (only if not included)
• A/C compressor O-ring set - Qty: 1
• R-134a refrigerant - Qty: 2-3 cans (final charge is by weight)
• A/C compressor oil (ND-OIL 8 / PAG) - Qty: 1
• Serpentine drive belt - Qty: 1 (recommended if worn/cracked)
• Receiver/drier or desiccant element - Qty: 1 (recommended anytime the system is opened)

---

📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear tires.
• Have refrigerant professionally recovered if you don’t have a recovery machine (specialty).
• Disconnect the battery: use a 10mm socket to remove the negative terminal and isolate it.
• Take photos before removing brackets and clips.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Recover the refrigerant (required)

• Connect the A/C manifold gauge set for R-134a to the low and high service ports.
• Use the refrigerant recovery machine (specialty) to recover the refrigerant completely.
• Confirm both gauges settle near 0 psi before opening any A/C line.

Step 2: Raise the front and remove the lower splash shield

• Lift the front using a floor jack (rated 3-ton minimum) and support with jack stands (rated 3-ton minimum).
• Remove the lower engine cover/splash shield using a trim clip removal tool and 10mm socket.

Step 3: Remove the drive belt

• Relieve belt tension using a serpentine belt tool or long 14mm wrench on the tensioner.
• Slide the belt off the A/C compressor pulley.
• Route a phone video of belt routing first.

Step 4: Unplug the compressor electrical connector

• Locate the compressor connector and release the lock using a pick tool (gentle) or flathead screwdriver.
• Unplug the connector and move the harness aside.

Step 5: Remove the refrigerant lines from the compressor

• Place rags under the fittings.
• Remove the A/C line retaining bolt(s) using a 10mm socket.
• Pull the manifold/lines straight off the compressor (do not pry hard on the tubes).
• Immediately cap the open lines using line caps/plugs assortment.
• Remove old O-rings using a pick tool (don’t scratch the aluminum sealing surface).
• When reinstalling the line retaining bolt(s): Torque to 9 Nm (80 in-lbs).

Step 6: Remove the A/C compressor

• Support the compressor by hand.
• Remove the compressor mounting bolts using a 12mm socket and 3/8" drive ratchet.
• Lower the compressor out carefully (watch the radiator/condenser fins).
• When installing the compressor mounting bolts: Torque to 25 Nm (18 ft-lbs).

Step 7: Prep the new compressor (oil balancing)

• Drain the shipping oil from the new compressor into a measuring cup (tilt and rotate the hub by hand).
• Add the correct amount of A/C compressor oil (ND-OIL 8 / PAG) to match what you removed (or per compressor instructions).
• Lightly coat new O-rings with a film of A/C compressor oil (ND-OIL 8 / PAG) before installing them.
• Never install O-rings dry.

Step 8: Install the new compressor

• Position the compressor and hand-start the mounting bolts using your fingers.
• Tighten mounting bolts evenly using a 12mm socket.
• Final tighten with a 3/8" drive torque wrench (10-80 Nm range): Torque to 25 Nm (18 ft-lbs).
• Reconnect the electrical connector until it clicks.

Step 9: Reinstall A/C lines with new O-rings

• Install new O-rings on the line manifold and align the manifold square to the compressor.
• Install the retaining bolt(s) using a 10mm socket.
• Final tighten with a 3/8" drive torque wrench (10-80 Nm range): Torque to 9 Nm (80 in-lbs).

Step 10: Reinstall the drive belt and splash shield

• Route the belt correctly and relieve tension using a serpentine belt tool or long 14mm wrench.
• Verify the belt is fully seated in every pulley groove.
• Reinstall the splash shield using a 10mm socket and trim clip removal tool.

Step 11: Evacuate (vacuum) the A/C system

• Reconnect the A/C manifold gauge set for R-134a.
• Connect the vacuum pump (specialty) and pull vacuum for at least 30 minutes.
• Close the manifold valves and confirm vacuum holds for 10 minutes (a rise suggests a leak).

Step 12: Recharge with R-134a by weight

• Charge using a refrigerant scale (specialty) so the amount is accurate.
• Recharge the system with R-134a refrigerant to the under-hood label specification.
• Start the engine, set A/C to MAX, and confirm low/high side pressures look normal for ambient temperature.

---

✅ After Repair

• Start the engine and verify the A/C compressor engages and the center vents blow cold.
• Listen for abnormal noise (grinding/squeal) and shut it down immediately if heard.
• Check for leaks at the compressor line manifold (oil wetness is a common clue).
• If cooling is weak at idle, confirm the radiator fans run with A/C on.
• Retorque isn’t needed if torqued correctly.

---

💰 DIY vs Shop Cost

Shop Cost: $900-$1,600 (parts + labor)

DIY Cost: $280-$750 (parts only)

You Save: $620-$850 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-5 hours.

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.