What are the actual size of the tyres on your Kadjar are the 19” if so does the 18” fit and safe to use.

225/45/19 so the 215/55/18 would also fit it’s the same size

Hi I just bought a 2016 Renault Kadjar Signature1.5 diesel Bose edition. I intend to purchase a spare wheel and tyre to fit in the subwoofer space in the boot. I would be interested if someone with the definitive solution would advice me as to the best option. Thanks. john r

If I remove subwoofer in order to install regular spare wheel, will head unit function normally, or will it report some errors all the time?

All the info you need is in this post... scroll through from the start ..

It's not really. There are different variations. Some have to add a longer bolt or cut the mat. I'm looking for the best solution without butchering the boot.
In other words the best size wheel and tyre to fit under the subwoofer and fit under car with 19" alloys in an emergency without causing any problem. Thanks