howling noise - that's why I bought a new pump, but this new one is just as noisy as the old one with 200,000 km on it. will last a year. I only kept it because pulling it out cost almost as much as I paid for it. and I will have more downtime while it is replaced. DO NOT BUY THIS BRAND! Just buy a real one from the dealer, yes you pay more but you get a much better pump.