I've seen a lot of issues occurring after the emissions fix - should I get it done to my Volkswagen Tiguan?

I have a 2008 Volkswagen Tiguan 2.0 TDi DSG. I've received a letter asking me to bring the car in for the software update. However, I'm worried about the problems other owners are reporting once they had the software update - such as ERG valve failing, economy of car worsening and fans running continuously after the car is parked. Is it compulsory to have the update? Will my car fail the emissions test if I don't have it done?

Asked on 19 July 2017 by Ahmed

Answered by Honest John
Not compulsory. VAG dealer will usually warn you off having the fix if your EGR or injectors are too worn to function properly after the fix. BBC Watchdog told the world last Wednesday night that VAG would guarantee no problems after the fix up to a mileage of 160,000 miles, but that assumes the car was fit for the fix in the first place.
Similar questions
My SEAT had the "fix", which has ruined the performance and fuel consumption and will likely lead to EGR failure in the future. Can I reset it by disconnecting the battery? Slim hope, I know.
I've had the emissions fix done on my SEAT Leon and now the car is a dog. Can Volkswagen reinstate the old engine remap and remove the flow obstructer from the inlet? The car is doing 15 per cent less...
I have a 2014 Porsche Macan 3.0-litre diesel, bought new. It recorded 42mpg or better on a long run and 39mpg average on short urban runs. Porsche wrote asking for the car to have a software update for...
Related models
Decent SUV with diesel automatic option. Comfortable seats. Escape version capable off-road. Optional Park Assist works well. Much better from September 2011 facelift.