What is this little filter for? Reminds me of a lawn mower fuel filter. Its located behind the airbox, seems like a vaccum port area?! There is nothing connected to the bottom.

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~ Brian
2008 WK Overland CRD

That is the "boost pressure soloniod filter" which is to be replaced every 50k miles, but good luck finding a replacement.

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2005 Liberty Limited CRD; Air Filter Monitor; Samco Hoses; GDE HOT Tune; RL037142AA TC; KJ Interior Rack from All J Products; JBA Adjust-a-strut lift and A-Arms; 245/75R16 Firestone Destination ATs on Moabs; ARB Bumper; ASFIR Skids; FS-2500 Bypass Filter; ARP studs.
2016 Grand Cherokee Overland CRD.

Could you just buy a 2 stroke fuel filter? or is it something special? Thanks for the info though! I was wondering what needed filtered air.

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~ Brian
2008 WK Overland CRD

I wouldn't worry about it unless it is damaged. While I don't know for sure, I imagine air is going both ways through the filter which would blow the filtered dirt off.

If you are worried, I am sure it can be ordered for you, I also believe any hose type filter the you can easily blow through would work just fine.

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2005 Liberty Limited CRD; Air Filter Monitor; Samco Hoses; GDE HOT Tune; RL037142AA TC; KJ Interior Rack from All J Products; JBA Adjust-a-strut lift and A-Arms; 245/75R16 Firestone Destination ATs on Moabs; ARB Bumper; ASFIR Skids; FS-2500 Bypass Filter; ARP studs.
2016 Grand Cherokee Overland CRD.

It's easy enough to find and costs less than $10 although IMHO if it looks clean at 50K forget about it. If you want to do a DIY replacement all it is is a small engine filter with the outside end ventilated a bit.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

I have never changed it in 10 years and don't think it has to be changed, all it does is prevent dirt from entering the vacuum valves that control boost (on 2002-2004 EGR valve) and heater position doors.....did you never hear the 'pfffrrrrrrrrrr' after shutting the engine down? That's when your KJ looses vacuum pressure trough this filter (it sucks in ambiant air).

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Cherokee 2,5 CRD: sold - Wrangler TJ 2.5: gone - Touareg V10 TDI: new toy

Solo Liberty en Español: Jeepliberty.es

Even at the dealer they are cheap.

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05 Liberty CRD Sport with Leather 115k
GDE ECO, No EGR, no FCV, (system gone)
Oil Drain plug P/N 090-039
K&N Air Filter, 2nd gen Fuel filter head
NEW Rockers & lifters
Mobil 1 0w-40
Stant 13519 195 deg inline Thermostat.
0 281 002 845 MAP
Etecno GX3123 7v Glow Plugs
Advance Gold 800CCA Battery
Traded it for a Quality VW TDI