My model of MX-5 is: 2016 1.5 Sport Nav
I am confused. The Mazda parts list seems to quote different Part Nos for the rear silencer for the 1.5 and 2.0 cars. However all the aftermarket rear silencers imply they are suitable for all models. So is there really a difference in the genuine Mazda ones and what is the difference?
I have the one for my 2.0 2019 back box going free if you want to pick it up it up from rugby its only done 1005 miles 
The one on the piece of carpet…..
Which two part numbers have you seen Ian?
I’m fairly certain it’s the same part, between 1.5 and 2.0 models.
What did you replace the OEM back box with ?
I have seen according to Mazda Parts lists
PE2R 40 100 for the 2.0 litre
P5C1 40 100 for the 1.5 litre
Thanks Ian, I thought it might be those two. I’d seen both of those part numbers too and what I’d found was the P5C1 40 100 was perhaps a sub-part number, potentially for JDM models. As to why they bother having two part identifiers, I couldn’t get to the bottom of that one!
I still believe both part numbers are interchangeable and compatible with either 1.5 or 2.0 NDs. There certainly weren’t two different parts diagrams I could find for each engine size.
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