C5 X7 Pollen Filter Replacement & Air System Clean How To

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C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by GiveMeABreak »

I thought I would post up a 'How To' on replacing the C5 X7 Pollen Filter and Cleaning the Air Con / Air System, specifically for the Right Hand Drive model, as the very few You Tube videos on this are for Left Hand Drive vehicles and are generally not in English. Citroen Service docs don't really help much either as they show the process for a Left Hand Drive model with pedals and different trim, as of course the heater components remain in the same place.

What You Will Need:
A Torx 20 Screwdriver
A Small Flat Blade Screwdriver
A Pollen Filter (Part 6479 45)
An Air Con Bomb or Similar (only if you are cleaning the A/C system) Air Con Bomb / similar Link
A Bright Torch
A Hoover

A Hot Bath Afterwards :-D

First of all there are 2 plastic screws under the passenger side glove box at the front that need to be turned 90°.
A - Trim Screws Close Up
A - Trim Screws Close Up
B - Unfastening the Passenger Trim
B - Unfastening the Passenger Trim
On the right edge of the trim, you will see a snap connector - push this in and the trim will loosen. Be careful as the footwell passenger light (if fitted) will be attached.
C - Trim Clip shown to the Right
C - Trim Clip shown to the Right
Using the Flat Head screwdriver, gently push in the small plastic lug of the Footwell Light and lever it out so that you can access the plug.
E - Lever Out the Footwell Light
E - Lever Out the Footwell Light
Disconnect the plug by pushing in the lug and pulling.
F - Unclip the Plug
F - Unclip the Plug
G My LED Replacement!
G My LED Replacement!
D - Underside of the removed Trim
D - Underside of the removed Trim
With the top trim removed, you can now see the Pollen Filter cover through the exposed recess.
H - Pollen Filter Clip
H - Pollen Filter Clip
We will need to remove the right hand side trim to get further access. Undo the Torx screw.
H2 - Use Torx 20 to Remove Side Trim
H2 - Use Torx 20 to Remove Side Trim
With the screw removed, gently slide the side trim forwards. There are 3 locating pins.
I - Remove Screw and  Slide Forward
I - Remove Screw and Slide Forward
Locating Pins:
I2 - Locating Pins Exposed
I2 - Locating Pins Exposed
Now Assume the Position!
I3 - Seriously!
I3 - Seriously!
VERY GENTLY pinch together the bottom 2 lugs to release the Pollen filter Cover. Once disengaged the cover will easily pull away.
J1 - Pollen Cover Off
J1 - Pollen Cover Off
Note: There are 2 holes on the cover that are to allow the cover to be screwed back into place if you inadvertently break the lugs off :roll:
Now, get your torch in place and gently pull the filter out - be warned there will be a load of crud and bugs flying out as the old filter springs out!
J2 - Crud Alert!
J2 - Crud Alert!
J3 - More Crud
J3 - More Crud
J4 -  Ease Out Filter
J4 - Ease Out Filter
As You pull out the filter, try and roll it, whilst pulling gently as there isn't a lot of room to pull it out directly.
J6 - Wrap and Pull
J6 - Wrap and Pull
Whilst we are here - this is the Heater Matrix Location!
J7 - Heater Matrix
J7 - Heater Matrix
... and the Heating Resistance unit - hmm, 2 Hours, 8 Minutes and 56 seconds on the label ??? - G7192002 is definitely the Heater resistance. perhaps that is the date and time is was made - how precise!
J8 - Heating Resistance
J8 - Heating Resistance
And while we are still here, this is the Blower Motor Control Unit that you can just see up through the Pollen Filter housing (arrowed in Yellow).
J10 Blower Motor Control Unit Arrowed (for Ref)
J10 Blower Motor Control Unit Arrowed (for Ref)
A better close up:
J9 Blower Motor Control Unit
J9 Blower Motor Control Unit
Back to the job at hand - here's the grotty filter in all it's glory:
K1 - Old Filter - Gross
K1 - Old Filter - Gross
K2 - Filter Crud
K2 - Filter Crud
Do I believe Citroen changed this last service... I don't think so [-X
K3 - No Way this Was Changed Last Service
K3 - No Way this Was Changed Last Service
Out with the big guns - time to hoover out all the rubbish.
K4 - Time For The Cavalry
K4 - Time For The Cavalry
'Bugs be Gone'
K5 - Dyson With Car Kit
K5 - Dyson With Car Kit
We bought the car kit with our Dyson Animal - it has a bendy crevice tool - great for getting into the recess at an angle.
K6 - Dyson Bendy Pipe
K6 - Dyson Bendy Pipe
Now for the Air System Clean (whilst the filter is out)
L - Air Con Bomb Time
L - Air Con Bomb Time
Read the instructions carefully, as you don't want to be in the car when this goes off. These all work similarly, but basically, move all seats forward and tilted towards the front of the cabin.
L1 - Move Seats Forward
L1 - Move Seats Forward
Close all windows and doors. Start the engine and use the following settings:
All Air vents Open
Ensure Air Distribution is Generalised throughout the car
Fan Speed Full
Set Temperature to coolest Level
Air Con On
Switch to RECYCLED AIR Mode
Place the Air Con Bomb in the Rear compartment on the floor in the middle. DO NOT activate it with your face looking down at it - Activate it from the side, then leg it and close the door.
L2 - Nuking the Cabin
L2 - Nuking the Cabin
L3 - 5 Minutes Later
L3 - 5 Minutes Later
Wait until the Bomb has fully discharged itself, then wait another 5-10 minutes before opening the doors.
Enter the car and switch off the engine. Put the seats back and the passenger seat down to help with the acrobatics necessary to get the new filter in.
M - The New Filter
M - The New Filter
Look at the notes or instruction either printed on the filter or on the instructions - the filter is designed to operate only one way and should be positioned so that the air flows correctly from the front of the car to the back of the car in the direction of the air flow as per the arrows:
M1 - Read Notes
M1 - Read Notes
M3 - Direction Important
M3 - Direction Important
Get your torch again, and with the filter in the correct position, you will need to flex it gently, angle it in through the top, then at the bottom, wiggling it up and down as you gently push it in. Just keep using your fingers to push at the top and bottom equally until it goes in. Once in, pull it out slightly and give it a wiggle to help ensure that the concertina has expanded and that the filter is fully in position.
M4 - New Filter In
M4 - New Filter In
Place your cover back on, and gently squeeze the clips, position the cover and release the clips. If you have broken these - you will need to use a couple of small screws to secure it back on.
M5-  Cover Back On
M5- Cover Back On
Slide your trim back on front to rear, ensuring the 3 pins locate properly, then screw back up once in position.
M6 - Slide Pins in First
M6 - Slide Pins in First
Next thread the wiring plug back through the top trim, re-attach the Footwell Light and snap into place, position trim, click the snap connector into position and do up the trim screws.
M7 - Re-attach Light and Trim
M7 - Re-attach Light and Trim
Job Done
Bath!

I can't really put a time on the job as I was taking pictures and had to wait for the chemicals to dissipate, but if I was doing the filter only, I would say about 30 minutes at least. Most of that is getting the old filter out, cleaning up and putting the new one back in.
Attachments
J10 - HMCU Seen Via Pollen Filt Recess
J10 - HMCU Seen Via Pollen Filt Recess
J9 - Blower Motor Control Unit
J9 - Blower Motor Control Unit
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by hoggers »

Thanks for this, looks like something I might even be able to manage!

Cars in Wednesday for a full service. What filters would you expect to be included? You mention Citroen didn't do it - did you pay for it to be done and they Judy didn't do it?


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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by GiveMeABreak »

Well That's what I think - because I have it regularly serviced with them - They are supposed to be replaced every 15k Km, so it is possible - but I think from now on I will Check myself - I've put a mark on the filter, so next time I want to check I'll know. They do different things at each service - so hard to say, but I'm glad I did it - the system is working with a new lease of life now - warp speed!
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by elma »

hoggers wrote:
Cars in Wednesday for a full service. What filters would you expect to be included? You mention Citroen didn't do it - did you pay for it to be done and they Judy didn't do it?

It's hit and miss with main dealers. The Scenic went to Renault for a full service at £150 and only got an oil and oil filter change.

To me a full service is oil, air and fuel filters. Plus oil, spark plugs (on petrols) and whatever else is on the service schedule for the particular car at that age/mileage. It should also include checks of brake, pas and all other fluids with top ups if necessary handbrake adjustment, oiling and greasing of moving parts like door hinges, pedal pivots.

I'm yet to see a full service from a dealer I approve of, some independents do a fine job though in my opinion.
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by Paul-R »

Nice guide Marc. It looks very similar to replacing the filter on the Mk1 from what I remember although I didn't have to get upside down.

It's good to know that the resistance/control unit is on the passenger side this time as the heater blower decided not work on my car yesterday morning just when the inside was full of condensation after a cold night. I hoped that it return for the trip home but didn't so will be having a look at the fuse tomorrow. And possibly control unit...
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by Stickyfinger »

GJob Marc, plan to do mine soon as well so this helps a lot

WHY is this showing as a double post ?
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by GiveMeABreak »

That's why I thought I'd take a pics of those other items whilst there as it may help put things into perspective seeing them in relation to the other parts.

That filter was gross. The fan is running a hell of a lot better now Paul.
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by Hell Razor5543 »

Erm, I think this thread is attempting to take over the whole forum! There appear to be three of it so far!
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by GiveMeABreak »

Stickyfinger wrote:GJob Marc, plan to do mine soon as well so this helps a lot

WHY is this showing as a double post ?
There's a delay Alasdair with this new image attachment feature. It seems to reload all the pictures as the Forum is hosting them now as opposed to just a link. No double post Alasdair, probably just the cache and the delay :-D
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by GiveMeABreak »

Hell Razor5543 wrote:Erm, I think this thread is attempting to take over the whole forum! There appear to be three of it so far!
My fault James! I copied it to the handy hints section for posterity and it's propogated. :-D
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by JohnD »

That's a very useful guide thank you and the job looks rather more difficult than replacing the filter on the 2006 edition. Currently I let the dealer do the annual service to maintain the Citroen warranty which I have and although the car was on 42000 at the last service, I was told the cabin filter is only changed if it's ordered to be done. That I did at considerable additional cost.
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by GiveMeABreak »

Thanks for that info John, i'll have to dig out some of my old service invoices to see if it was done and if so when. To be honest the job wasn't that difficult when you're not taking pictures and fiddling about with things. It can be a bit difficult withdrawing the filter and putting it back in but generally the trim is dead simple to take out on the passenger side so quite an easy job. Now I've done it once it should be even quicker next time round as I know what I'm doing. I really was surprised at how dirty and how much rubbish is inside that filter, and when you consider that's what's filtering out the air you breathe in the cabin it was quite disgusting. So I will certainly be changing it at least once a year from now on myself.
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by KennyW »

Great info Marc, will be doing a mini service soon including pollen filter as I couldn't figure it out in the summer. I will also be sorting the advisories from the MOT.

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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by GiveMeABreak »

I just checked - last service was a Citroen 'Essentials' fixed price service and that was for Oil Filter, Plug, Air Filter, Diesel Filter & Oil and a Body inspection, Total £234.95 inc. VAT! Again that was for warranty, so now that is coming to an end, I think I'll be doing most of that.
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Re: C5 X7 Pollen Filter Replacement & Air System Clean How To

Post by elma »

That is expensive, maybe £50 worth of parts and £200 for 20 mins labour. I hope you got at least £300 out of the warranty.