Hi, so have you remapped your car and he no issues to date..
No, I've never mapped a car. I have thought about it, it's been a common practice for many years now, but I wouldn't do it. Not nowadays anyway.
When microprocessor control of engines became a thing, car manufacturers realized they could alter the power output of the engine by doing nothing more than changing the software controlling it. They could effectively build one engine and use it in cars with different power output needs which simplified production.
Car production is much more sophisticated today. Car makers do not over-spec parts if they can avoid it and they are pretty good at avoiding it!
To give a specific example. I discovered that BMW used the same size of piston in a very wide range of engines. Physically they were interchangeable but the quality of the piston varied depending on the power of the engine. I can't remember how many but say there were four different qualities of piston. This could be done in the manufacturing stage quite easily but to simplify things in the service chain they only supplied one piston. The best one. So if you need to replace a piston you'd get one that could be safely used in any engine. At a glance these pistons probably look similar, if not identical, but they're not. This is typical of how car manufacturers work today. They are not going to put a gearbox in a car which is able to handle fifty percent more power than it needs to. All that does is make the car more expensive for no reason.
I think you might be the first potential modder to openly acknowledge and accept this fact, well done :0) Other parts of your car and engine will not be designed to run that sort of power and you might have reliability problems. From what I've seen, upping the power of a car has a similar effect to neglecting maintenance. In the long term the car in unreliable and can develop expensive problems. They can be hard to sell or end up broken on the driveway.
A few years ago I read an article in Fast Ford magazine about a tuning company who could get an extra 50bhp out of the little 1L Ecoboost Fiesta. It was the cover feature. I contacted them, just out of interest really, and they said 'Yeah, you can do this, but don't!'. They had done this as showcase for what was possible but the car wasn't a daily driver and reliability wasn't a concern. He said that nothing else in the car was built to take that kind of power and ultimately, things are going to break.
He also said that the stock car's handling wasn't good enough for that kind of power. To make that more relevant to you, the VW group does not produce an MBQ platform car with 180 bhp which does not have independent rear suspension.
The arguments are typically ignored by guys wanting to have a fast car but not being able to afford to just buy one but the risks are real. Ultimately this cheap power might end up costing you a lot more than you think. Personally, I'd rather have a reliable car that's properly insured and which I'll be able to sell easily one day.
