Hello everyone.

 

I'm looking to replace the fuel injectors on my 2011 CAVE. It is currently fitted with the 03C906036F variant, which is known to have a narrow spray pattern that doesn't atomise well.

 

I've looked at various parts catalogues and can see there are 2 subsequent revisions - M and N suffix. It is usually stated that M is for vehicles manufactured before 08/12, and N for those after.

 

My question is, why doesn't the N suffix just supersede M for all twinchargers regardless of manufacturing date? The switchover date makes me wonder if it's due to the different ECUs in CAVE vs CTHE engines - can anyone confirm if I'm along the right lines, please?

 

There's info out there saying the M variant's wider spray pattern fouls the spark plugs, so if the N variant rectified this and can be applied to a CAVE engine, I'd naturally rather go for those! Thank you.

I suspect you're overthinking this somewhat.

The most likely explanation that rev N is not recommended for earlier cars is that it simply hasn't been tried with them.

@sepulchrave Thanks for the advice, I’m hoping you’re right. I’ve got a set of N variants on order, I’ll update this post with the outcome in case anyone else has the same query. 👍

For anyone who has the same query, the 03C906036N variant is not a direct swap for CAVE engine. They were issued in CTHE engines and have different connector plugs. They can still be fitted, but the connector plugs for the wiring loom have to be changed first.