FAO 318iS Massive ...

[CaesarBob]

Has anyone ever had to buy HT Leads for their M42? No. 4 on my car is bit dodgy so i've been looking around for some new 'uns.

My mate can get me a full set for around £85 (but they ain't genuine) or BMW will sell individual leads for about £28+VAT each.

So next question: is it ok to replace one lead out of 4 or should you replace the full set in one go?

Anyone recommend good brand leads that are cheap?

[Lordschleife]

I'd stick with the std BMW ones
Don't see why you can't replace just one lead, I did this on my crx and it was fine

[Andrew]

You must check they are all performing well but its not much of an issue to change just one.

Andrew

[CaesarBob]

I thought i'd stick with BMW ones but just wasn't sure whether replacing one was a good idea. Never replaced HT leads on a car so i've got no experience.

Mods: does someone want to move this to the technical section please? More appropriate there.

[Karan]

i had magnecor on mine and they worked nicely, were pricey at 130ish though

Karan

[CaesarBob]

Ԛ£130 is a bit more than i fancied forking out right now. Reckon at the moment that one new 'un from BMW sounds like the favourite.

[E30Mark]

Bob,

I have a 2nd hand set of leads if your interested... in fact i think i have 2 sets!

If you want just want #4 lead let me know, i'm willing to split the set, as i know for a fact that one set has a split insulator on #1. That is the reason i changed the leads on my iS when i first bought it.

Got my leads from GSF, from memory were about Ԛ£80 and genuine parts.

[CaesarBob]

Before i commit to buying new leads can someone tell me what the best way to test them is?

Reason i'm thinking something is amiss was i had the cam cover off at the weekend and when i put that back on i just checked i had the right leads connected to the coil packs. Just checked the leads with a beeping multimeter and 1, 2 & 3 all beeped while 4 didn't. Therefore i assume there's something wrong. But the car still runs fine so i'm confused.