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Details
| Specification | Value |
|---|---|
| Brand | Donaldson-AU |
| MPN | p821908 |
OE numbers (14)
Search by this OE number to find compatible parts
- CATERPILLAR—1355787
- CATERPILLAR—1438169
- HITACHI—31002111120
- MASSEY FERGUSON—3596976M92
- CATERPILLAR—3I1983
- HITACHI—4287060
- HITACHI—4287060LHE
- XCMG—800104345
- NEW HOLLAND—87682997
- HITACHI—AT204019
- HITACHI / JOHN DEERE—AT204029
- HITACHI—X3100211112
- HITACHI—X4287060
- CASE IH / FIAT—YN02P000013B
Where this part fits
Original-fit position for OE 1355787. The red ring marks where this part installs on the vehicle.
About this product
Donaldson-AU Secondary Air Filter (P821908) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Fitting Position: 167 — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. This part supersedes original equipment references: 1355787, 1438169, 31002111120, 3596976M92 and 25 more. Matching these numbers confirms a like-for-like replacement with no loss of function. Donaldson-AU is a recognised supplier of automotive filtration components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
Suitable cars
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (17)
Secondary Air Filter Donaldson-AU P821908 — compatible car models
| Manufacturer article number (MPN) | P821908 |
|---|---|
| OE part numbers | 1355787, 1438169, 31002111120, 3596976M92, 3I1983, 4287060, 4287060LHE, 800104345, 87682997, AT204019, AT204029, X3100211112, X4287060, YN02P000013B |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
Donaldson-AU p821908 . Fitting Position: 167
- 1x Secondary Air Filter
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this Secondary Air Filter compatible with my car?
Use the vehicle selector at the top of the page to check compatibility. Enter your car's make, model, and engine — we'll confirm whether this Secondary Air Filter fits. All fitment data is verified through TecDoc.
What specifications does this Donaldson-AU Secondary Air Filter have?
This Donaldson-AU Secondary Air Filter has the following specifications: Fitting Position: 167. Check the full specifications table above for complete details.
What OE part numbers does this Secondary Air Filter replace?
This Secondary Air Filter replaces OE part numbers: 1355787, 1438169, 31002111120, 3596976M92, 3I1983, 4287060, 4287060LHE, 800104345 and 6 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Secondary Air Filter cost?
This Donaldson-AU Secondary Air Filter is available for £69.99. Secondary Air Filter prices vary depending on brand, specifications, and vehicle compatibility. Donaldson-AU parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Secondary Air Filter?
Regular inspection of your Secondary Air Filter is recommended as part of routine vehicle maintenance. Watch for changes in performance, unusual noises, or visual signs of wear. Consult your vehicle's owner manual for manufacturer-recommended replacement intervals specific to your make and model.
What tools do I need to replace a Secondary Air Filter?
Tools required vary by vehicle make and model. Generally, a basic socket set, screwdrivers, and vehicle-specific tools may be needed. We recommend consulting a workshop manual for your specific vehicle, or having the Secondary Air Filter fitted by a professional mechanic.
Can I use this part as a replacement for OE 1355787?
Yes, this Donaldson-AU Secondary Air Filter is a direct replacement for OE part number 1355787. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
