Parts for your 2008 Honda Odyssey-Ac compressor

2008 Honda Odyssey AC Compressor: what it does and how to look after it

The 2008 Honda Odyssey is fitted with an air-conditioning compressor from factory, so the part is absolutely relevant to this model. This is confirmed by Honda’s Factory Service Manual HVAC section for the 2005–2010 Odyssey range, Honda’s genuine parts catalogue (EPC), and DENSO’s OE compressor application guides for this vehicle. Under the bonnet, the A/C label also specifies R‑134a refrigerant and the required compressor oil type, which further indicates a belt-driven compressor with an electromagnetic clutch is used.

On this Odyssey, the A/C compressor’s job is to pressurise and circulate refrigerant, moving heat out of the cabin so the air comes out crisp and cool. It’s a variable-displacement, clutch-driven unit designed to modulate output smoothly, helping fuel economy and keeping the family comfy on long Kiwi and Aussie road trips.

Looking after the compressor is mostly about clean airflow, correct refrigerant charge, and healthy lubrication. Regularly run the air‑con year-round to keep seals oiled. Keep the condenser (in front of the radiator) free of bugs and debris, and check the serpentine belt and tensioner for wear. Always follow the Honda label under the bonnet for the correct refrigerant and oil type—typically a PAG oil that meets Honda/DENSO spec. Any A/C work must be done by a licensed technician (ARCtick in Australia, certified handlers in New Zealand) because venting refrigerant is illegal.

• Common symptoms of a tired compressor: warm air at idle, loud clicking or grinding from the clutch, short-cycling, metal flake in the oil, or high/low side pressures out of spec.
• Good servicing practice when replacing the compressor: replace the condenser desiccant (or the condenser if it’s a micro‑tube design that can’t be flushed), renew all O‑rings, flush lines and the expansion components if contamination is present, add only the oil amount specified by Honda for the job, evacuate to deep vacuum, then charge by weight. Always leak‑test and verify vent temps and pressures.
• Don’t forget the electrical bits: check the A/C clutch relay, clutch air gap, and radiator/condenser fans. A weak fan can mimic compressor trouble.

Done right, a fresh compressor and a tidy system will keep a 2008 Odyssey blowing frosty for years without dramas.

How can someone tell if the compressor or just the clutch has failed on a 2008 Odyssey?

A failed clutch often shows as the pulley spinning but the hub never engaging, or it engages with a rapid chatter and slips. Electrically, the clutch coil may have no continuity, or the relay won’t trigger it. A failed compressor usually brings noisy operation when engaged, metal debris in the system, abnormal high/low pressures, or poor cooling even though the clutch is pulling in. A licensed tech can confirm by checking clutch current draw, hub air gap, and system pressures.

Is fitting a second‑hand compressor a good idea?

It can work, but it’s a gamble. Without proof of oil cleanliness and no internal wear, a used unit may seed metal through the system. If going used, insist on a clean system flush, fresh desiccant, new O‑rings, and the correct oil top‑up. Many prefer a quality reman or new OE‑equivalent to avoid doing the job twice.

What refrigerant and oil does the 2008 Odyssey use?

This model uses R‑134a refrigerant with a PAG oil meeting Honda/DENSO spec (often labelled ND‑OIL 8). The exact charge weight and service oil amounts vary—always follow the under‑bonnet A/C decal and the Honda service manual. Charging by weight and measuring the oil added and removed keeps the compressor happy.