Hi, I need help. My 2011 Fabia failed it's MOT. It needs a new front part of the exhaust, namely the catalytic converter and dpf. I'm trying to source a second hand one but have no idea what it looks like, does anyone have a picture/diagram? I thought I found one but was told it was just the dpf part, not the actual cat as well. I've got 3 weeks til my mot runs out ☹️. Many thanks in advance, I'm keeping my fingers crossed ha ha, Jo 

failed MOT because  ??

 

will look like this

 

https://www.onlinecarparts.co.uk/bm-catalysts-8170690.html

Edited 28 March, 20224 yr by UrbanPanzer

They are one piece, the cat is the portion that connecters to the turbo and the DPF is the large box at the bottom past the flexi. There are slight variations between 2010-14 on the 1.6tdi. Do you know if your dpf has 1 or 2 pressure sensor pipes? My 2010 dpf had one vs the used replacement i got which was from a 2014 fab had only one sensor pipe. (on the photos of the exhaust on the pathway you can see where the garage cut out the post sensor pipe off my old dpf to weld onto the newer one. 

 

Is there a reason you need a new one is the cat failed or is there a problem with the exhaust piping? A new part will set you back over £750+ VAT 

 

I have attached a few photos of my old and replacement so you can see what to look for  

 

Just out of curiosity @JGrindel how do you know that the parts aren't the other way round, DPF first, cat after?

1 hour ago, Pete_Ex-Wino said:

Just out of curiosity @JGrindel how do you know that the parts aren't the other way round, DPF first, cat after?

Due to the pressure sensors places before and after the DPF which then get sent to the DPF pressure difference sensor in the engine bay. Mine had both before and after but the 2014 replacement only had before, hence the garage welding the aft sensor onto the replacement. The problem with the 1.6tdi engines is the DPF was too far away from the engine itself and struggled to get up to temp and they tend to clog easily. 

 

@AMD87also advised me the DPF was the second box. 

Ta. 

8 minutes ago, Pete_Ex-Wino said:

Ta. 

There is so much conflicting information on the 1.6tdi dpf due to so many different vehicles using the engine... 

Hi all, thanks for the pictures, at least I know what I'm looking for now.  It failed because the pipe going to it all has just crumbled. Once again, thanks everyone 👍

On 29/03/2022 at 13:30, Heath42 said:

Hi all, thanks for the pictures, at least I know what I'm looking for now.  It failed because the pipe going to it all has just crumbled. Once again, thanks everyone 👍

Double check that an exhaust shop cant fix the pipe, its common for the flexi to fail on these and its easily replaced by a reputable garage (exhaust specialists)