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Vaillant O-ring for e.g. aroTHERM VWZ MPS 40 0020166935
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Vaillant O-ring for e.g. aroTHERM VWZ MPS 40 0020166935

€ 21.77 incl. VAT

Original spare part Vaillant. Type: O-ring. Application: Boiler / ecoFIT pro VUW 256/6-3. Delivery time: approx. 7–10 days. Supplier code: 0020166935.

Special-order item — delivery time approx. 7–10 days — non-returnable

SKU: 8052891 Categories: , Brand:

Price and stock checked on 20 October 2026.

Made-to-order item — ordered specially for you, see delivery time below
EU delivery from € 17.95 · Shipping & payment

Price incl. VAT. Any delivery costs are calculated in the basket — see shipping & delivery.

Does this fit my appliance?
ApplicationBoiler
Series / modelaroTHERM VWZ MPS 40 and 5 other models
Vaillant number0020166935
Article number8052891
Not sure? Search by article or manufacturer number or check with the manufacturer or your installer.
All spare parts for Vaillant aroTHERM VWZ MPS 40 →
Made-to-order item — this spare part is not on our shelf and is ordered specially for you from the manufacturer or wholesaler, delivery time approx. 7–10 days. Specially ordered items cannot be returned: the manufacturer or supplier does not take them back. So check the type number of your appliance and the article number of the spare part beforehand. In doubt? Check with the manufacturer or your installer (see also returns).
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Vaillant O-ring for e.g. aroTHERM VWZ MPS 40 0020166935: original Vaillant spare part, type: O-ring. Application: Boiler (ecoFIT pro VUW 256/6-3). Manufacturer number: 0020166935; Instalpunt article number: 8052891.

According to the Vaillant parts lists, this part fits 6 models, including Vaillant ecoFIT pro VUW 256/6-3, Vaillant ecoFIT pro VUW 256/6-3 EXP and Vaillant ecoFIT pro VUW 306/6-3. The full list is under “Fits”.

Special-order item (delivery time approx. 7–10 days): it is ordered specially for you from the manufacturer and is non-returnable.

Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer. Work on gas-carrying parts must be carried out by a qualified gas engineer.

Product information: Vaillant O-ring for e.g. aroTHERM VWZ MPS 40 0020166935

BrandVaillant spare parts
Vaillant manufacturer number0020166935
Instalpunt article number8052891
EAN4024074681251
Part typeO-ring (All Vaillant gaskets and seals · gaskets and seals of all brands)
ApplicationBoiler
Suitable for6 Vaillant models (see list)
DeliverySpecial-order item, delivery time approx. 7–10 days
Price€ 21,77 incl. VAT
OriginSupplied through the official technical wholesale channel, under Vaillant number 0020166935

Fits 6 Vaillant models

The part Vaillant O-ring for e.g. aroTHERM VWZ MPS 40 0020166935 is in the official parts list of these Vaillant appliances. Click a model for the complete parts list and exploded view.

Vaillant Boiler (5)

Vaillant Heat pump (1)

Check the rating plate of your appliance. Not sure whether this part fits? Check with the manufacturer or your installer; with the correct manufacturer number you can order it here directly.

Position on the parts diagram

This part appears on the exploded view of 6 appliances. Open the drawing for the appliance and click the number to check that you have the right part.

Available: O-ring for the same appliances

This part is currently out of stock. These Vaillant parts of the same type are listed for at least one of the same appliance models and are available.

Before ordering, check the manufacturer number in the spare parts list or exploded view of your appliance.

Frequently asked questions about this item

Does the Vaillant O-ring for e.g. aroTHERM VWZ MPS 40 0020166935 fit my appliance?
This part is in the parts list of 6 Vaillant models, namely the ecoFIT pro VUW 256/6-3, ecoFIT pro VUW 256/6-3 EXP, ecoFIT pro VUW 306/6-3, ecoFIT pro VUW 306/6-3 EXP, ecoFIT pro VUW 356/6-3, aroTHERM VWZ MPS 40. The model type is on the rating plate of your appliance. If in doubt, ask the manufacturer or your installer.
What is the delivery time of this made-to-order item?
This is a special-order item: we order it specially for you from the wholesaler. The expected delivery time is approx. 7–10 days. You can also see the delivery time next to the stock status at the top of this page.
Can I return this made-to-order item?
A specially ordered item is not taken back by the supplier, so returns are not possible. So check the article number and the rating plate of your appliance beforehand. Is something wrong with your order? Then contact us via info@instalpunt.nl. The full terms and conditions are on returns.
What does shipping cost?
Shipping costs € 17.95 to Austria, Denmark, Italy, Spain and Sweden and € 24.95 to other EU countries. In-stock items ordered before 2 pm are dispatched the same working day; delivery usually takes 3–5 working days. Details: Shipping.
I have a fault code, which part do I need?
Look up the code in the fault code finder: per brand and appliance it shows what the code means and which part goes with it. If the code is listed with this part, the part belongs to that fault.

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