2007 Kia Rio- 145k- Recall For Anti Corrosion

Hello ,
I got an email on 8th august 2019 from Kia of Canada

Thank you for contacting Kia Canada Customer Experience Department. We received your email sent July 12, 2019 regarding your vehicle owner information for your 2007 Kia Rio.

Thank you for providing us with your vehicle information.

I have researched your Vehicle Identification Number KNADE1234xxxxxxxxxx and can confirm the following item is currently outstanding and have not been completed on your vehicle.

Specifically:

Ø SC11-B; (JB) ADDITIONAL ANTI-CORROSION

Please call your local Kia Dealer immediately to schedule a service appointment. The time required to repairs will be communicated to you by the Dealer. However, depending on the Dealer’s work schedule, it may be necessary to make your vehicle available for a longer period of time.
This work will be performed at Kia’s expense at no cost to you.

...........So, I called nearest dealership to have my anti corrosion recall covered.

I went there next day, only to find out that they can not do recall because I have a hole in a subframe. I was told they will let Kia know that I would need a subframe replaced and they called me three days ago - which was on 13th August to let me know that my subframe replacement was approved and Kia already sent a part for them to replace it. I can come in anytime to have subframe replaced at a No cost to you. They also told me it would take them few days to have this done and they would give me a loaner.

Now my questions are

1. Considering there is nothing wrong with my car drivability wise - is it advisable to have them open up my car and do this replacement ?

2. It’s 2007 Kia Rio at 143k and running in 10/10 condition - what are the chances they would break my car more in attempt to fix it ?

3. Would they come back and say hey ! We need you to spend money on Knick-knacks that surrounds the subframe ( bushings - mounts , joints and other expensive - non expensive stuff.)

4. I don’t trust people in general, that being said how much I will be able to loose or gain by opening up perfectly working car to fix something and end up breaking it more

5. I would like to run this car for another 40-50k before I look for anything else or major maintenance - does subframe replacement would render it useless if things gets broken more in it? ( I am a conscious driver and run synthetic oil and keep my car well maintained for small stuff and do not want major expenses or headache of purchasing another car ATM )

In short, I don’t know anything about subframe replacement and any unknown variables due to it down the road.

Please tell me it is ok to do this OR am I getting a broken car with free subframe in return ?

Be honest, why Kia would replace 12 year old cars subframe for free - what’s in it for them ? Why are they so interested in my recall for anti corrosion and than take a hit for a subframe ( replacement would cost more than actual value of a car,lol! )

I have an appointment in first week of September and it’s only to collect data from your guys so I can make transparent and informed decisions on this.

I am Sorry for my ferengi English and rhetorics,as I tend to elaborate everything to get my point across - please re read or ask questions if you want more information.

*ignore typo because THIS RFDapp does not let me go up select a spell and correct it. It types only one way and that’s it.