Imasen B5B4 relay as fitted to the Mazda MX5 MK1 / MK2 / MK2.5  / Eunos 1989 - 2005 as well as Mazda 323, 3, 6, 626, Premacy.

There are two types of B5B4 - This listing is for the Black top with wider fitting. If your car has a B5B4 with a green top and bottom with a narrower fitting do not buy as this part will not fit. If you have a colour preference, green or white bottom, please add a message when you checkout. They both have the same function so if I don't hear from you the nearest part to hand will be sent out.

This is the fuel pump relay on the MX5.

Guaranteed to come to you in good working condition.

I have every conceivable relay for the MX5 / Eunos MK1, MK2 and MK2.5 1989 - 2005

Contact me.     


I enjoy dealing with people abroad but ebay stipulate that delivery outside of the UK goes through the Global Shipping Program. The Global Shipping Program have recently lost the plot and are seriously restricting countries they will deliver my MX5/Eunos Car parts to. Quite a few parts can only be supplied to the UK as GSP opting out! If you are in a country outside of the UK and there appears to be a block on delivery to you, please get in touch and I will do my utmost to offer a solution; the cost may well be less than the GSP service anyway.