Being completely fed up with garages I've decided to do servicing of my Focus CC myself.

Doesn't look too difficult except I don't quite understand which air filter I shall use?

There are two types of the filters: one is flat square  and another one is round.

Any idea what shall I choose? The engine is 2.0 TDCI 136 and the car is roughly similar to Focus 2.5

Pop the bonnet and see what you have fitted at the minute to be sure. 

The early Focus MK2 versions did have flat panel type air filters. Every type of engine basically has a slightly different type of air filter.  After the interior facelift (early 2007) all engine types (except the Focus ST)  have the same round type air filter. This round type air filter is currently still used on all Focus MK3/MK3.5 versions.

 

it should be the round filter as my old 2008 focus had a round filter.

you`ll find it on ebay 

eBay item number:

391318887328

i find the round filter a bit tight to fit in the housing on mine 

Hmm.. looks like the only definitve answer is to open the filter housing and check it myself. :)

for now I just ordered both filters from Eurocarparts  - will fit the one that fits and the other one will go back to store.

2 hours ago, dezwez said:

i find the round filter a bit tight to fit in the housing on mine 

it sometimes depends on the make 1st ever one i changed on my old focus i had to press down on the filter a little to make it fit in, now i`ve got the hang of it get `em slotting in no probs

36 minutes ago, TheRookie said:

Hmm.. looks like the only definitve answer is to open the filter housing and check it myself. :)

for now I just ordered both filters from Eurocarparts  - will fit the one that fits and the other one will go back to store.

i hope you used the discount code on eurocar parts, as there way over priced at the mo

I sure did! :)

9 hours ago, andypsp said:

it sometimes depends on the make 1st ever one i changed on my old focus i had to press down on the filter a little to make it fit in, now i`ve got the hang of it get `em slotting in no probs

not just me then