Flew LHR-MUC-NRT and the connection time was 35 minutes. Reservation said it was within mct. I had reserves but went for it. Delay at LHR and was rerouted to FRA to fly via a NH codeshare flight. Obviously missed the bulkhead seat I had secured and ended in the middle at the back of the plane on a 100% full flight. Lots of aggravation with paperwork, etc.

There is a big "IF" as in "IF the previous flight arrives on time or ahead of schedule". MUC is a smallish airport (compared to FRA for instance) so you should make it, if all goes well. But I'd be careful if the flight from Malaga tends to be delayed.

Next time I'll book an earlier flight. I know many people will not agree, but personally I'd rather be at the airport earlier and be comfortable, even if this means having to get up an hour earlier!