Flexi replacement on 2003 Audi A2 tdi
These high quality cars have a one piece exhaust system. My car has the original system still working well after 14 years apart from the weakest point, the flexi, just after the turbo. Unless you want to replace the entire system at an horrendous cost, or, buy another aftermarket front pipe which includes the catalytic converter (I was quoted between £800 and £900 for a complete system and £300-£400 for the front section alone) then this part is very well worth considering.
Fitting the flexi is not for the faint hearted, and, I would say that unless you have above average DIY skills, get a garage to fit it for you.
The tools I needed for the job were a mini-grinder (usually air powered) but I bought a 240v 3 inch grinder from ebay at just £25. A one-handed hacksaw (a handle that accommodates a full size hacksaw blade but allows you to access small spaces, a large pair of Stilsen grips to allow you to manoeuvre the flexi into place.
All things considered I wouldn't want to do this job on a regular basis, but, it has saved me a lot of money.
With regard to the part itself. The angles of the pipes were not quite right, which is surprising considering that Audi parts are all the same and very accurate, but you can make it fit if you know what you are doing. Be prepared for some hard work with the hacksaw, because space is very limited and you are working under the car.
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