Almost every vehicle today will likely bend a valve if the timing chain breaks or, more likely, slips a cog or two.
I don’t understand the vacuum pump failure causing the timing chain to fail - that part doesn’t make sense to me.
This lady should take the $6000 and be happy - get her car fixed for $4000. That isn’t bad for replacing the engine. She cites the price of the engine, but nothing about the labor to remove and replace the old engine. Also, there are refurbished engines and refurbished engines.
If she gets the work done at the dealership, she will likely pay more overall, 10,000 seems a bit pricey, but the $4000 she will pay is fair - and she will have a stronger hook into BMW if something should go wrong again.
Dealerships are the pit of hell.
Repent, ye, or be thrown into eternal hellfire.
10k is pricey for a lawn mower engine? Lol. I guess so when you can buy a 2011 Hyundai Sonata with 30k miles on it for 10k. Which is exctly what I paid.