How to Replace the A/C Compressor on a 2018 Hyundai Kona (Recover, Vacuum & Recharge)
Step-by-step replacement guide with required tools/parts, O-rings & PAG oil tips, and recharge-by-weight safety notes
How to Replace the A/C Compressor on a 2018 Hyundai Kona (Recover, Vacuum & Recharge)
Step-by-step replacement guide with required tools/parts, O-rings & PAG oil tips, and recharge-by-weight safety notes


🔧 Kona - A/C Compressor Replacement
On your Kona, replacing the A/C compressor is a mechanical swap plus a sealed refrigerant-system service (recover, vacuum, and recharge). The job can’t be done correctly (or legally/safely) without properly recovering the refrigerant and pulling a deep vacuum before recharging.
Difficulty Level: Advanced | Estimated Time: 3-6 hours
⚠️ Safety & Precautions
- ⚠️ Refrigerant must be recovered with approved equipment; do not vent to air.
- ⚠️ Wear eye protection and gloves; liquid refrigerant can cause frostbite.
- ⚠️ Keep dirt out of A/C lines; cap/plug openings immediately.
- ⚠️ Allow engine to cool; you’ll work near hot components.
- ⚠️ Battery disconnect is recommended before unplugging the compressor.
🔧 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
- 1/2" drive breaker bar
- Torque wrench (10–150 ft-lbs range)
- Trim clip remover
- Phillips screwdriver
- Flat-blade screwdriver
- Serpentine belt tool (specialty)
- A/C manifold gauge set (specialty)
- Vacuum pump (specialty)
- Refrigerant recovery machine (specialty)
- Refrigerant scale (specialty)
- Line (flare-nut) wrench set metric (specialty)
- O-ring pick set
- Shop rags
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- A/C compressor (correct for Kona 1.6T AWD) - Qty: 1
- A/C compressor manifold O-ring set - Qty: 1
- PAG A/C oil (correct viscosity for Kona) - Qty: 1
- Refrigerant (type and exact charge amount per under-hood label) - Qty: 1
- Serpentine belt - Qty: 1
📋 Before You Begin
- Park on level ground, set the parking brake, and chock the rear wheels.
- Plan for refrigerant recovery/recharge: either you have the equipment, or a shop recovers/recharges for you.
- Disconnect the negative battery terminal using a 10mm socket (recommended).
- Have caps/plugs ready for A/C lines. Cleanliness prevents repeat failures.
🔨 Step-by-Step Instructions
Follow these steps in order:
Step 1: Confirm refrigerant type and charge spec
- Check the under-hood A/C label for refrigerant type (examples: R-134a or R-1234yf) and the exact charge weight.
- Write down the refrigerant type and charge amount; you will need this for recharge using a refrigerant scale (specialty).
Step 2: Recover the refrigerant
- Connect the A/C manifold gauge set (specialty) to the high and low service ports.
- Recover refrigerant using a refrigerant recovery machine (specialty) until the system is fully evacuated.
- If you don’t have recovery equipment, stop here and have a shop recover the refrigerant before you open any lines.
Step 3: Raise the front and remove lower covers (as needed)
- Lift the front with a floor jack (rated 3-ton minimum) and support with jack stands (rated 3-ton minimum).
- Remove any lower splash shields using a trim clip remover and metric socket set 8mm–19mm.
Step 4: Remove the drive belt from the A/C compressor
- Relieve belt tension using a serpentine belt tool (specialty).
- Slip the belt off the compressor pulley and route it out of the way.
- If the belt shows cracks/glazing, replace it now. Belts are cheap insurance.
Step 5: Disconnect the compressor electrical connector
- Unplug the compressor connector by releasing the lock tab using a flat-blade screwdriver (gentle pressure).
- Move the harness aside so it can’t get pinched.
Step 6: Remove the A/C lines/manifold from the compressor
- Place shop rags under the connection to catch any residual oil using shop rags.
- Loosen the line/manifold fasteners using a line (flare-nut) wrench set metric (specialty) or the correct socket.
- Immediately cap/plug the open lines and the compressor ports.
- Remove and discard old O-rings using an O-ring pick set.
Step 7: Unbolt and remove the compressor
- Support the compressor by hand while removing mounting bolts using a metric socket set 8mm–19mm and 3/8" drive ratchet.
- Remove the compressor from the bracket and maneuver it out carefully.
Step 8: Set up the new compressor (oil + O-rings)
- Verify the new compressor matches the old one (mounts and ports).
- Drain and measure oil from the old compressor into a container, then add the same amount of correct PAG A/C oil (correct viscosity for Kona) to the new compressor.
- Lightly lubricate new O-rings with PAG oil and install them on the line/manifold fittings.
- Too much oil reduces cooling.
Step 9: Install the new compressor
- Position the compressor and start all mounting bolts by hand using a metric socket set 8mm–19mm.
- Tighten mounting bolts with a torque wrench (10–150 ft-lbs range) to the factory spec for your Kona’s compressor mounting bolts.
Step 10: Reconnect A/C lines/manifold
- Remove caps/plugs and connect the lines carefully to avoid damaging O-rings.
- Tighten line/manifold fasteners using a torque wrench (10–150 ft-lbs range) to the factory spec for your Kona’s A/C line manifold bolts.
Step 11: Reconnect electrical connector and reinstall belt/covers
- Plug in the compressor connector until it clicks.
- Reinstall the serpentine belt using a serpentine belt tool (specialty) and confirm correct routing.
- Reinstall splash shields using a trim clip remover and metric socket set 8mm–19mm.
Step 12: Vacuum and recharge the A/C system
- Connect the A/C manifold gauge set (specialty) and pull vacuum with a vacuum pump (specialty).
- Hold vacuum and confirm it does not rise (leak check).
- Recharge by weight using the correct refrigerant (type and exact charge amount per under-hood label) and a refrigerant scale (specialty).
✅ After Repair
- Reconnect the battery terminal using a 10mm socket.
- Start the engine and turn A/C to MAX; confirm cold air and stable idle.
- Check for leaks at the compressor manifold connection using the A/C manifold gauge set (specialty) readings and visual inspection.
- Listen for abnormal belt squeal; recheck belt routing if needed.
💰 DIY vs Shop Cost
Shop Cost: $900-$1,700 (parts + labor)
DIY Cost: $350-$900 (parts only)
You Save: $550-$800 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.
I need 2 quick details to make this Kona-specific and include the correct torque specs:
- 📌 What does your under-hood A/C label say for refrigerant type and charge amount?
- 📌 Are you doing the recovery/evac/recharge yourself (have the machines), or will a shop handle that part?

















