Hi mate, yep I have had the same failure, and the replacement part is apparently an upgrade, but despite trying that forced regen and quite a few things actually my DPF regens have been on milage ever since, and this was back when the engine was still relatively stock. I've no chance of getting back to "normal" regens now, but I'd be having a long chat with VW as to how exactly you adapt the new sensor, for I wasn't able to get it to work as the old one had, which is rather odd, but like you the stock DPF days were numbered so I didn't dwell on it.

Hope to have options on the DPF soon, just need to prove it will work....