You can't cover up anymore. If you make a defective product, own it at the first opportunity, fix it, buy it back, make it right.
What you should not do is spend a decade lying to your dealers, your customers, and the governments of the countries you sell your product in.
It's the internal Ford documents and emails that will bring the heat on this. It's been going on for 10 years. A senior Ford engineer was warning about this since the car was being developed. Ford has already paid the Australian government $10 million (AU) as a result of the way they treated the car owners.
This is expected to cost Ford $3 Billion (US) before it's over.
Here's the news report.
And here's an absolutely wonderful and hilarious review of the issue and the outcome in Australia.