FWIW, even if the engine is sound, you still own a AWD vehicle with lots of moving parts underneath. Even replacement of a minor component these days will set you back nearly $1000, depending on how labor intensive the job is.

Vehicles these days are chock full of electronics, and cracking open a dashboard or swapping out a computer module also racks up the $$$.

So go ahead and get a warranty for another 50K.

I have a balloon payment due in November, so I will be in your shoes shortly...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car