XC 70 – ez 02.2004 -120 000km – motor damage

XC 70 — motor damage hello dear community, I came across you via google and also annoyed you with a question: drive the volvo xc70 – and have now with a motor damage. problem: car was tuned in a car tuning center known to me – no power chip but direct intervention in the control unit….the type meant that this cannot be recognized afterwards. I have now thought about the guarantee for the replacement engine…what do you think? many thanks for your info, volvo300