This link provides more details but basically after 3 years normally, in the UK anyway, there is a MOT inspection due to determine roadworthiness including emissions test - hence exhaust inspection.
As its only appears after 3 years it may be why you have never seen it.
You basically need to get the vehicle up for MOT then get the messages cleared when passed - I am sure I cleared mine myself rather than getting a dealer to use it.
Abdulla, bring your car to me, let's hook her up on the OBD and reset this reminder! Screw them!
Unless you wanna take it in for inspection? Up to you!
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