Mokka repair egr cooler

[sar666]

Hiya new to this so be gentle
I've a 11 year old Vauxhall Mokka and have been told by two garages that I need the egr cooler replaced. Cool beans you would think but Vauxhall don't make that part anymore but I've managed to source one on eBay.
My question is, as it's a long job to replace the cooler, should I ask garage to do the egr valve at the same time? think my car has two, one with the cooler.
Any help would be amazing

 

[carmanmemoranda]

What engine?

What mileage?

What service history?

What type of driving?

What have emissions been like over the last few months? Figures staying the same, or climbing etc

How long is your piece of string?

But for absolute piece of mind, why not change it?