Purchased for a 2001 Honda Prelude. Delivery as expected, fits as expected. When we tested the car, the high-pitched whine grew louder as the engine revs. Bleed the system again - no change. Topped up four bottles of Honda PS fluid and installed new O-rings. No leaks. Nothing helped. Called Cardona and they told me every step I had taken and then they said maybe my pump had failed. Went and bought one from O'Reillys, installed it and it works great. In the course of returning this pump.