My wife had a Camry many years ago, and it was rated the most reliable car made by Consumer Reports and others. It had an oil leak at the back of the engine, very slight, that dripped oil slowly onto the exhaust manifold heat shield. That caused it to always have an obnoxious burnt oil smell to it, nearly overpowering. Even after sitting overnight it stunk badly.
I personally took that car to the dealership no less than 7 times to get the oil leak fixed. It would go away for a couple of months, then return. After 7 different attempts over 3 years, it still returned to leaking and stunk to high heaven. Letters to Toyota didn't help, and a second dealership was also unable to fix it. The only thing the dealerships were good for was charging me a lot of money, but they weren't able to fix a simple oil leak. Replaced the same part every time.
Last Toyota I'll ever own.