Any Auto Supply store, any good hardware store, but a feeler gauge for the valves may or may not work well for your plugs.
Depending on the plugs which may or may not have more than one "finger"... a flat gauge might not work well. Plugs typically nowadays use a wire-type gauge.... but, most modern plugs do not need setting.
Typical BMW plugs last 20,000 or more then replace.
Depending on the plugs which may or may not have more than one "finger"... a flat gauge might not work well. Plugs typically nowadays use a wire-type gauge.... but, most modern plugs do not need setting.
Typical BMW plugs last 20,000 or more then replace.
