2019 Subaru Outback: A/C Refrigerant & Oil Specifications

Quick answer: 2019 Subaru Outback A/C Specifications

• Refrigerant Type: R-1234yf
• Full System Charge: 16.8 oz (475g) +/- 0.9 oz (25g)
• PAG Oil Type: PAG 46 (specifically, Subaru Genuine A/C Compressor Oil Type DH-PS)
• Total System Oil Capacity: 3.4 fl oz (100 mL)
• Low-Side Service Port Location: Near the firewall on the passenger side, behind the shock tower.
• High-Side Service Port Location: In front of the condenser, near the radiator on the passenger side.

Why R-1234yf matters

Starting in the mid-2010s, automakers began transitioning from R-134a to the more environmentally friendly R-1234yf refrigerant. Your 2019 Subaru Outback uses R-1234yf, which has a much lower Global Warming Potential (GWP) than its predecessor. While this is great for the atmosphere, it comes with a few trade-offs for consumers. R-1234yf is significantly more expensive than R-134a, and it requires specialized, R-1234yf-specific recovery and charging machines. This is not a DIY-friendly refrigerant, and it's crucial to use the correct equipment to avoid system damage and ensure safety.

Recharge procedure

A proper A/C recharge is not just about adding refrigerant. The correct procedure involves:

1. Evacuation: The system must be fully evacuated for at least 30 minutes using a recovery machine to remove all old refrigerant and non-condensable gases like air and moisture.
2. Vacuum & Leak Test: After evacuation, the system should be held under a deep vacuum for at least 15-30 minutes to check for leaks. If the vacuum doesn't hold, there's a leak that needs to be repaired before proceeding.
3. Charging by Weight: The system must be charged with the precise weight of refrigerant specified by the manufacturer—in this case, 16.8 oz (475g). Charging by pressure using a gauge set is inaccurate and can lead to undercharging or overcharging, both of which can cause cooling problems and damage to the compressor.

Common A/C problems for this vehicle

While the 2019 Outback is a reliable vehicle, some common A/C problems to watch for include:

• Compressor Failures: The A/C compressor is the heart of the system, and when it fails, it can send debris throughout the entire system. A catastrophic compressor failure will require a full system flush and replacement of the condenser and expansion valve.
• Condenser Issues: Located at the front of the vehicle, the condenser is susceptible to damage from road debris. A punctured or leaking condenser is a common cause of A/C system leaks.
• Evaporator Leaks: The evaporator is located inside the dashboard and is responsible for cooling the air that blows into the cabin. A leaking evaporator is a difficult and labor-intensive repair.

When to call a pro

Due to the specialized equipment and training required to work with R-1234yf, it's highly recommended that you leave any A/C service on your 2019 Outback to a certified professional. Attempting to service the system yourself can result in costly damage and personal injury.

Safety Disclaimer: The EPA requires that anyone servicing a motor vehicle air conditioning (MVAC) system be Section 609 certified. Always wear safety glasses and gloves when working with refrigerants.

Find a certified A/C shop on Repairius.