What is this unit (Mondeo content)?

[John Vine]

This is from my 2018 Mondeo Mk5 2L diesel estate.  There's no mention in the handbook, or anywhere on the web as far as I can see.

I've just replaced the battery, which entailed removing the air-box to gain access.  The unknown box came out with the air-box as a connected unit.

JV

[Geoff Brown]

Is it a primary intake manifold as it appears to be connected to the air box/filter assembly & has a small by pass pipe to the main trunking?

[Benton]

 

looks like a "jazzed up version " of the air box. My earlier Galaxy only has one single air box.

[aerobod - near CYYC]

That looks to be a resonator chamber to reduce the air intake noise emanating from the head back through the air filter.

[John Vine]

Thanks, folks.

#4: That's an interesting thought, James. When I first ran the car after changing the battery, I could detect a quiet "rushing air" sound (a bit like a mild turbo boost) on gentle acceleration.  It certainly wasn't there before so I'm wondering if I've upset or misaligned something.

I detached the two hoses at these points, and removed both boxes together as a unit:

I'll have a look tomorrow.

JV

[John Vine]

An update (only really of interest to owners of later Ford 2L diesels ).....

There's a rubber bellows seal here between the extra (resonator?) box and the air intake. 

It's only a contact joint, but I suspect I'd introduced a slight leak there on reassembly.  A small adjustment via the mounting screws seemed to fix it.

JV