The Kärcher WD 2-18 takes the Kärcher KFI 3310 cartridge filter 2.863-303.0 for WD 2 Plus, WD 3 and WD 3-18 as its filter; Australian sellers list it from A$27.46 each as of 28 October 2026. Fitment confirmed against the manufacturer's compatibility list.
Your vacuum cleaner
Kärcher WD 2-18
Wet and dry vacuum
Confirmed against Kärcher's listConfirmed against Kärcher's own compatibility list
Not yours? Change
Takes the 2.863-303.0 filter
KFI 3310 cartridge filter 2.863-303.0 for WD 2 Plus, WD 3 and WD 3-18 · check the code printed on your old filter before ordering.
Your vacuum cleaner
Wet and dry vacuum
Confirmed against Kärcher's listConfirmed against Kärcher's own compatibility list
Takes the 2.863-303.0
Filter · check the code on your old filter.
Other Kärcher vacuum cleaners that take the 2.863-303.0
GenuineGenuine Kärcher
$38.90
Sydney Tools · 28 OctLowest genuine · Sydney Tools · checked 28 Oct
CompatibleCompatible option
$27.46 each
2-pack $54.92
Amazon AU · 28 OctAmazon AU · checked 28 Oct
Check sellerCheck seller details
Genuine: made by Kärcher. Compatible: another brand.Genuine is made by Kärcher. Compatible is made by another brand. Check the seller's page for the size and models it fits.
Lowest compatibleLowest compatible price · $27.46 each · 2-pack $54.92
Amazon AU. Compare with genuine below. Some links earn us a commission. Some seller links earn us a commission, at no extra cost to you.
This vacuum cleaner also takes a dust bag
- Kärcher KFI 357 fleece filter bags 2.863-314.0 for WD 2 Plus, WD 3 and WD 3-18 (4 pack)Open Amazon AU$2.74 each · 12-pack $32.88
Separate from the filter. Reduces fine dust reaching the cartridge filter.
Compare 3 sellers
Compare 5 listings from 3 sellers
AUD, before delivery. Each price shows when it was checked.
Compatible options
2 listings from 1 seller
Genuine Kärcher
3 sellers
Opens Amazon AU in a new tab. Their page is the source of truth for price, delivery and returns.
How long it lasts
Replace it when it is damaged, Kärcher says; until then, rinse it under running water when it gets dirty (no rubbing or scrubbing) and let it dry completely before you refit it.
After replacing: No reset. These vacuums have no filter reminder.
How to change the filter in your Kärcher WD 2-18
Watch the guide or follow the steps.
- 1Switch the vacuum off and pull out the mains plug; on a battery model, take out the battery pack.
- 2Open the container closure and lift off the device head. The cartridge filter sits on the filter basket under the head.
- 3Turn the cartridge filter towards the unlock symbol and lift it off the filter basket.
- 4Fit the new filter over the filter basket and turn it towards the lock symbol until it is held firmly.
- 5Put the device head back on the container and close it. Kärcher says never to vacuum without the filter fitted, wet or dry.
Every number this part goes by
- Retail name:
- 2.863-303
- Retail name:
- 2.863-303.0
- Retail name:
- KFI 3310
- Replaces:
- 6.414-552.0
Sellers list any of these; they are the same part.
About your Kärcher WD 2-18
Kärcher vacuum cleaner, wet and dry vacuum — Battery WD (18V). Its filter is the KFI 3310 cartridge filter 2.863-303.0 for WD 2 Plus, WD 3 and WD 3-18, part 2.863-303.0.
Also in this vacuum cleaner: Kärcher KFI 357 fleece filter bags 2.863-314.0 for WD 2 Plus, WD 3 and WD 3-18 (4 pack).
Where the model number is: The rating label is on the underside or the back of the main body; the old part usually has its own code printed on it.
Fits these 14 Kärcher models
Common questions
- Which filter fits the Kärcher WD 2-18?
- The Kärcher WD 2-18 takes the Kärcher KFI 3310 cartridge filter 2.863-303.0 for WD 2 Plus, WD 3 and WD 3-18. Compatible filters made to the same specification also fit.
- Where can I buy the 2.863-303.0 in Australia?
- We track 3 Australian sellers for the 2.863-303.0; the lowest listed price when we last checked was A$27.46 at Amazon AU. Prices are re-checked daily and dated on this page.
- How do I fit the 2.863-303.0 in a Kärcher WD 2-18?
- No tools, a few minutes: 5 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- Suction drops and the vacuum may cut out on a blocked filter.
- Is there anything to reset afterwards?
- No reset. These vacuums have no filter reminder.
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