Those friendly people at a Mazda garage made me laugh yesterday. I asked them where the engine number was on my '5 as I was registering it. They asked if it was Japanese, I said yes, and they said "that's the trouble with these Japanese Eunos's - they have the engine number under the cylinder head so you have to take the head off to read it. That's why we don't like them 'cos it's not easy to see if the engine number is correct or if the cars been involved in an accident or even written off " All I wanted was to know where to look 'cos I knew you had to sand the block to see it. (5/00)
Where is the engine number then because I could not find it? (5/00)

As you look at the engine from the front of the car it's at the back left side. That's the drivers side near the bulkhead, above where the gearbox joins and under the end of the intake manifold. You will find a small flat on the engine where it meets the cylinder head which sticks out towards the drivers side of the car. You have to have double jointed wrists but you have to sand this flat to remove the corrosion. A number will appear on the flat edge in the following format.

B6
123456 (5/00)

Note this is 1.6 only..... 1.8 is on the right of engine .. right at the back under the dip stick. (5/00)