🔧 BRZ - A/C Compressor Replacement

On your BRZ, the A/C compressor swap is a mechanical job plus a refrigerant-handling job. The mechanical part is very doable, but the system must be properly recovered, vacuumed, and recharged to avoid damage and to keep it legal/safe.

Difficulty Level: Advanced | Estimated Time: 3-6 hours (plus A/C service time)

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⚠️ Safety & Precautions

• ⚠️ Refrigerant must be recovered with proper equipment; do not vent to atmosphere.
• ⚠️ Keep hands/clothes clear of belts and pulleys; remove the key from the car while working.
• ⚠️ Avoid skin/eye contact with refrigerant/oil; it can cause frostbite and eye injury.
• ⚠️ Use jack stands on solid points; never rely on a jack alone.
• Disconnecting the battery is recommended before unplugging the compressor clutch connector.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• 10mm socket
• 12mm socket
• 14mm socket
• 3/8" drive ratchet
• 3/8" drive torque wrench (10–80 Nm range)
• Serpentine belt tool or 14mm wrench
• Trim clip removal tool
• Flat-blade screwdriver
• Needle-nose pliers
• A/C manifold gauge set (specialty)
• Vacuum pump (specialty)
• Refrigerant recovery machine (specialty)
• Refrigerant scale (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• A/C compressor - Qty: 1
• A/C compressor O-ring set - Qty: 1
• Receiver/drier or desiccant element - Qty: 1
• R-134a refrigerant - Qty: As specified on under-hood label
• PAG compressor oil - Qty: As specified on under-hood label

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📋 Before You Begin

• Park on level ground, put the transmission in gear, set the parking brake, and chock the rear wheels.
• If the A/C system still has pressure, schedule recovery first (shop or proper recovery machine).
• Take a clear photo of the under-hood A/C label (it lists refrigerant type and exact charge amount).
• Disconnect the negative battery terminal using a 10mm socket.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm refrigerant/oil specs (required for accuracy)

• Use your phone to take a clear photo of the under-hood A/C label (usually on the underside of the hood or near the radiator support).
• This label is the only reliable source for the exact factory charge amount and oil spec for your BRZ.

Step 2: Recover the refrigerant (must be done before opening the system)

• If you have the equipment: connect the A/C manifold gauge set (specialty) and recover with a refrigerant recovery machine (specialty).
• If you don’t: have a shop recover the refrigerant, then bring the car back for the mechanical swap.
• Never crack a line “to see if it’s empty”.

Step 3: Raise the front and remove the lower covers

• Lift the front with a floor jack (rated 2-ton minimum) and support with jack stands (rated 2-ton minimum).
• Remove the undertray/splash shield clips with a trim clip removal tool and screws with a 10mm socket.

Step 4: Remove the drive belt from the compressor

• Rotate the belt tensioner using a serpentine belt tool or 14mm wrench to relieve tension, then slip the belt off the A/C compressor pulley.

Step 5: Disconnect the compressor electrical connector

• Unplug the compressor connector by releasing the tab using a flat-blade screwdriver gently if needed.

Step 6: Remove the refrigerant lines from the compressor

• Remove the line retaining bolt(s) using a 10mm socket.
• Carefully wiggle the lines free (do not pry hard). Catch any oil drips with rags.
• Remove and discard the old O-rings; replace with new O-rings from the A/C compressor O-ring set.
• “O-ring” is a rubber sealing ring.

Step 7: Remove the compressor

• Support the compressor by hand, then remove its mounting bolts using a 12mm socket and/or 14mm socket (bolt heads vary by bracket location).
• Lower the compressor out carefully.

Step 8: Prepare the new compressor (oil balancing)

• Before installing, you must match oil quantity to factory spec from the under-hood label.
• If the new compressor is pre-filled, you typically measure and adjust (drain/measure and refill) so the system total stays correct.
• I’ll give the exact oil handling steps after your label photo.

Step 9: Install the new compressor and reconnect lines

• Position the compressor and start all mounting bolts by hand to avoid cross-threading.
• Tighten mounting bolts with a torque wrench to the correct Subaru spec.
• Lubricate new O-rings with the correct PAG oil, install them, then reinstall the lines and tighten with a 10mm socket and torque wrench to spec.
• Exact torque values depend on the label/manual; I won’t guess.

Step 10: Reinstall belt and covers

• Route the belt correctly and use the serpentine belt tool or 14mm wrench to set it back on the pulley.
• Reinstall the undertray with a 10mm socket and clips using a trim clip removal tool.

Step 11: Vacuum and recharge the system

• Evacuate the system using an A/C manifold gauge set (specialty) and vacuum pump (specialty) to remove air/moisture.
• Recharge by weight using a refrigerant scale (specialty) to the exact amount listed on the under-hood label.

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✅ After Repair

• Reconnect the battery with a 10mm socket.
• Start the engine and turn A/C on; confirm the compressor engages and the air gets cold.
• Check for leaks at the compressor fittings (oil residue is a common clue).
• If the A/C cycles rapidly or isn’t cold, stop and re-check charge amount and vacuum hold.

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💰 DIY vs Shop Cost

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

DIY Cost: $350-$900 (parts only, assuming you already have A/C service equipment)

You Save: $300-$900 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2.5-4.5 hours.

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🎯 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.

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Two quick questions so I can give you the exact torque specs + exact recharge amount:

• 📸 Can you upload a clear photo of the under-hood A/C label?
• 🧰 Will you be doing the recover/vacuum/recharge yourself (recovery machine + vacuum pump + scale), or will a shop handle that part?