How to Replace the A/C Compressor on a 2018 Nissan Murano (R-134a System)
Step-by-step removal/install with required tools & parts, safety tips, O-rings, PAG oil, and recharge guidance
How to Replace the A/C Compressor on a 2018 Nissan Murano (R-134a System)
Step-by-step removal/install with required tools & parts, safety tips, O-rings, PAG oil, and recharge guidance


🔧 Murano - A/C Compressor Replacement
Replacing the A/C compressor on your Murano involves safely recovering the refrigerant, removing the drive belt and A/C lines from the compressor, swapping the compressor, then vacuuming and recharging the system. The refrigerant handling step is both safety-critical and legally regulated, so the process depends on whether you have access to proper A/C service equipment.
Difficulty Level: Advanced | Estimated Time: 3-6 hours
⚠️ Safety & Precautions
- ⚠️ Refrigerant can cause frostbite and eye injury; never vent A/C refrigerant to the air.
- ⚠️ Refrigerant recovery/evac/recharge requires approved A/C service equipment; many DIYers have a shop recover and later vacuum/recharge.
- ⚠️ Work only on a cool engine; keep hands clear of the belt path.
- ⚠️ Support the vehicle securely; never rely on a jack alone.
- ⚠️ Battery disconnect is recommended before unplugging the compressor clutch/control connector.
🔧 Required Tools
You'll need the following tools for this repair:
- Floor jack (rated 3-ton minimum)
- Jack stands (rated 3-ton minimum)
- Wheel chocks
- Safety glasses
- Nitrile gloves
- Metric socket set (8mm-19mm)
- 3/8" drive ratchet
- 1/2" drive breaker bar
- Torque wrench (10-150 ft-lbs range)
- Serpentine belt tool (specialty)
- Trim clip removal tool
- Flathead screwdriver
- Pick tool set
- Line/flare nut wrench set (metric)
- Drain pan
- A/C manifold gauge set for R-134a
- Vacuum pump (A/C) (specialty)
- Refrigerant scale (specialty)
- A/C refrigerant recovery machine (specialty)
- UV dye light (optional)
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- A/C compressor (complete unit) - Qty: 1
- A/C compressor O-ring seal kit - Qty: 1
- PAG A/C compressor oil (Nissan-spec) - Qty: 1
- R-134a refrigerant (vehicle-spec charge amount) - Qty: 1
- Serpentine drive belt - Qty: 1
- Receiver/drier or condenser/drier assembly (if system was open or compressor failed internally) - Qty: 1
- A/C expansion valve (recommended if compressor failed internally) - Qty: 1
📋 Before You Begin
- 🧭 Park on level ground, set the parking brake, and chock the rear wheels.
- 🔌 Disconnect the negative battery terminal using a 10mm socket.
- ❓ Quick checks before we start (please answer):
- Do you have FWD or AWD? (Access and shield removal can differ.)
- Can you get the refrigerant professionally recovered and later vacuumed/recharged, or do you have an A/C recovery machine?
🔨 Step-by-Step Instructions
Follow these steps in order:
I can give you the exact, trim-correct removal path and the correct torque specs once you confirm the two items above (FWD vs AWD, and how you’ll handle refrigerant recovery/evac/recharge). Those details change the access steps and the required final-charge process.
Reply with “FWD” or “AWD” and “shop recovery” or “I have a machine”.
✅ After Repair
- 🧪 Verify the system is vacuumed and holds vacuum before charging.
- 🧊 Confirm vent temperature drop and that the compressor engages normally.
- 🔎 Check for leaks at the compressor manifold using an approved leak check method.
💰 DIY vs Shop Cost
Shop Cost: $900-$1,800 (parts + labor)
DIY Cost: $350-$900 (parts only)
You Save: $550-$900 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-6 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.

















