Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Capacity Information
Refrigerant R134a and refrigerant oil capacities, refer to REFRIGERANT R134A CAPACITIES .
-- Bleed, evacuate and fill the refrigerant circuit. Refer to Description and Operation .
-- Operate the A/C system after filling the refrigerant circuit, refer to A/C SYSTEM, OPERATING AFTER FILLING REFRIGERANT CIRCUIT .
- Depending on time period of production and on engine, compressor construction type may vary.
- At the beginning of production, A/C compressor was manufactured by Denso (type 7 SEU 16 or 7 SEU 17) were installed; from MY 2004 A/C compressors by other manufacturers (Delphi, Sanden or Zexel) may also be installed. Refer to CAPACITIES, AUDI A3 (8P_) FROM MY 04 .
- Beginning the production year 2006, the name of the Zexel A/C compressor was changed from Zexel to Valeo.
- Depending on the type of A/C compressor (for example Denso Type6 SEU 14, 7 SEU 16 or 7 SEU 17) there are different refrigerant capacities for the refrigerant circuit, refer to CAPACITIES, AUDI A3 (8P_) FROM MY 04 .
- Compressor as replacement part has different oil fill capacities, therefore note the exact part number, refer to [REFRIGERANT OILS . The reason for the different oil capacities in the compressor is the design of the compressor itself, note these oil capacities. Too much oil in the circuit leads to higher pressures and reduces cooling performance of the system. Too little oil may lead to lubrication problems in the compressor.
- Always fill refrigerant circuit as far as upper tolerance limit (some refrigerant remains in filler hoses).
- The refrigerant circuit may only be filled with approved refrigerant oils.
- Zexel, Sanden and Denso compressors require different refrigerant oils, refer to REFRIGERANT OILS .
- Use only the specified oil from a sealed container and always reseal oil container immediately after use (PAG oil absorbs moisture). Do not use oil if it is contaminated with moisture or if oil container has been left open.
- Additional information, refer to General Information .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.