What is the correct noid light number for a Series 3? I have a Bosch PFI #3405.
Is it the right one. They sell sets of them, so what is the difference between them?

 

That's probably the right one.

I have a set at work. I'll take a peek and see if the one used on my Jags has any identifications.

I think most are the same operationally, not sure. I wanna say the difference is in the actual physical shape...which varies in accordance to the shape of the connector the light is intended to pug into

Cheers
DD

 

The things I learn in car forums!
I'd never heard of a Noid Light!
However, Google knows everything, can show you most of it, and what they can't show, YouTube can.

The Internet!
A Fascinating place!
How did the world function for all those Centuries without it!?
(';')

 

I'm in the process of using a set by OEM, it's their part number 27161.. There really is no 1 light that fits particularly well, but you can get by with ones that are a little on the loose side by having someone hold it on the terminals whilst you crank the engine.