Well I had a shorty arial from MX5parts fitted for two whole days and I have swapped back. I am a BBC6 music fan and the reception was noticeably worse with the short arial to the point where there were sections of my normal commute where I lost the station completely. Swapped back to the long stock arial and normal service was resumed. I recall someone posting on here that the visible arial was for FM and the DAB one was elsewhere in the car. I suspect that isn’t true based on my experience. Every day is a school day!

Oil Filler Cap, Red, MX5 Mk4
Oil Filler Cap, Red, MX5 Mk4. Genuine Mazda Accessory Fantastic looking and great quality Genuine Mazda aluminium oil filler cap in an anodised red finish. Features the MX-5 logo on the top in white. Fits all Mk4 models, 2015@