Subaru OEM A/C Line O-Ring Subaru WRX 02-07 / STI 04-07 | 73039AA300

Product Fitment:

• 2002–2007 Subaru Impreza

• 2002–2007 Subaru WRX

• 2004–2007 Subaru STI

• 1991–1993 Subaru Legacy

Overview

The Genuine Subaru OEM A/C Line O-Ring (Part #73039AA300) is an exact-fit sealing component designed to maintain a leak-free refrigerant connection in your air conditioning system. Purpose-built for 2002–2007 Subaru WRX models, this factory-spec O-ring ensures your A/C lines seal properly against moisture, pressure loss, and refrigerant leaks. When replacing A/C lines, fittings, or servicing your climate control system, using a genuine OEM O-ring is the only way to guarantee factory-level performance and longevity.

Key Features & Benefits

• Genuine Subaru OEM Quality – Manufactured to Subaru's exact factory specifications, ensuring a perfect seal and reliable performance every time.
• Exact-Fit Design – Engineered specifically for 2002–2007 WRX A/C line connections; no trimming, adapting, or guesswork required.
• Refrigerant-Resistant Material – Formulated to withstand the pressures and chemical properties of automotive refrigerant, preventing premature cracking or compression set.
• Prevents Refrigerant Leaks – A properly seated OEM O-ring eliminates micro-leaks that cause A/C system inefficiency, compressor damage, and costly recharges.
• Factory Warranty Coverage – As a Genuine Subaru part, this O-ring is backed by Subaru's OEM parts warranty when installed by an authorized dealer.
• Cost-Effective Repair – A small investment that prevents expensive A/C system failures and repeat refrigerant recharges.

What's Included

• 1x Genuine Subaru OEM A/C Line O-Ring (Part #73039AA300)

Specifications

Installation

This O-ring is a direct replacement for the factory A/C line seal and requires no modifications. During A/C line service, lubricate the new O-ring lightly with clean PAG oil before installation to ease seating and prevent tearing. Ensure the mating surfaces are clean and free of debris before assembly. Torque all fittings to the factory specification to avoid over-compression of the seal. It is recommended to have the A/C system evacuated and recharged by a certified technician using proper refrigerant recovery equipment after O-ring replacement.