Advice please.

invalid@example.com (Z Victor 1), Z Victor 1
Thu, 12 Mar 2026 18:51:08 +0000

How often do the plugs need changing on my E89 23i ?
Also which plugs? I fitted NGK long life on my Z3 and E85, both 2.2.
It had new plugs at 48k and is now at 67k, so I'm wondering whether to get plugs for it's service which is due end of April.