Not sounding too good, from what I've read. How long ago did you buy this vehicle? I ask because in the states, I think there is a requirement of either a 30 day or 60 day warranty. Not applicable to sales from private individuals. Just thinking out loud here.
Would it limp well enough to act like a reasonable trade-in (to a dealer)? I wouldn't sell that to a private individual, but dealers make the sneaky underhanded actions of casinos look like a sunday school lesson. So I'd let a dealer have it if I could sneak it through. If you could only find a dealer with a manual transmission Mirage. Course, you may be hating Mirages by now ... not saying I blame you.
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View my fuel log 2020 Mirage ES 1.2 manual: 42.4 mpg (US) ... 18.0 km/L ... 5.5 L/100 km ... 51.0 mpg (Imp)