So I ordered a new main and fuel pump relay off of partsgeek.com. They said the fuel pump relay was specific for my 85 325e however when it arrived at my house it was a 5 prong relay. I wanted to install the new relays this weekend and decided to check autozone, advanced auto etc. to see if I could pick one up at the store. The fuel pump relays that are listed on the website are between $55-85 a piece. Bavauto has 4 prong relays for $9. Should the fuel pump relay be so expensive or will the relay on bavauto do thee trick?