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Details
| Specification | Value |
|---|---|
| Brand | MANN-FILTER |
| MPN | cu3944 |
| Category | Filter, interior air |
| Length [mm] | 390 mm |
| Width [mm] | 150 mm |
| Height [mm] | 20 mm |
OE/OEM numbers (2)
Search by this OE number to find compatible parts
- NEOPLAN—1804 127 10
- MAN—N1.01103-3282
About this product
MANN-FILTER Filter, interior air (CU 3944) is manufactured to OEM tolerances, ensuring a direct-fit replacement that restores your vehicle to factory specification without any modification. Technical specifications — Length [mm]: 390 mm, Width [mm]: 150 mm, Height [mm]: 20 mm, Filter type: 21, EU General Product Safety Regulation (GPSR): Aluminium — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. This part supersedes original equipment references: 030 787 102, 031, 031F, 11033282 and 32 more. Matching these numbers confirms a like-for-like replacement with no loss of function. MANN-FILTER 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 from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
About MANN-FILTER
MANN-FILTER, part of the MANN+HUMMEL group founded in 1941 in Ludwigsburg, Germany, is one of the world's leading filtration specialists. The brand produces oil filters, air filters, fuel filters, cabin filters, and hydraulic filters for virtually every vehicle application. MANN-FILTER is an OE supplier to major manufacturers including Volkswagen, BMW, and Mercedes-Benz. With ISO/TS 16949 certification and products tested to the highest standards, MANN-FILTER ensures clean oil, air, and fuel for optimum engine protection and longevity.
Suitable cars
Vehicle matches are curated from manufacturer data
Confirmed fits based on manufacturer data.Equivalent products (27)
Show all 27 OE numbers
Filter, interior air MANN-FILTER CU 3944 — compatible car models
| Manufacturer article number (MPN) | CU 3944 |
|---|---|
| OE part numbers | 1804 127 10, N1.01103-3282 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
MANN-FILTER cu3944 Filter, interior air. EU General Product Safety Regulation (GPSR): 2. Filter type: 21. Height [mm]: 20 mm. Length [mm]: 390 mm. Width [mm]: 150 mm
- 1x Filter, interior air
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- 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 Filter, interior air 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 Filter, interior air fits. All fitment data is verified through TecDoc.
What specifications does this MANN-FILTER Filter, interior air have?
This MANN-FILTER Filter, interior air has the following specifications: Length [mm]: 390 mm; Width [mm]: 150 mm; Height [mm]: 20 mm; Filter type: 21; EU General Product Safety Regulation (GPSR): 2. Check the full specifications table above for complete details.
What OE part numbers does this Filter, interior air replace?
This Filter, interior air replaces OE part numbers: 1804 127 10, N1.01103-3282. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Filter, interior air cost?
This MANN-FILTER Filter, interior air is available for £24.99. Filter, interior air prices vary depending on brand, specifications, and vehicle compatibility. MANN-FILTER parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my Filter, interior air?
Replace when you notice reduced airflow from the HVAC system, persistent musty odours, increased noise when the fan is running, or fogging windows. Most cabin filters should be changed every 15,000-25,000 miles.
What tools do I need to replace a Filter, interior air?
Tools needed: flat-head screwdriver or 8mm socket may be required to remove the glove box (location and access varies by model -- check the vehicle handbook). Difficulty: Easy DIY. Safety warning: Wear a dust mask when removing a heavily contaminated cabin filter -- it traps fine particulates, allergens, and bacteria.
Can I use this part as a replacement for OE 1804 127 10?
Yes, this MANN-FILTER Filter, interior air is a direct replacement for OE part number 1804 127 10. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Is the MANN-FILTER CU 3944 the same as the MANN-FILTER CU 14 001?
No, while both are Filter, interior air parts, they are different products. The MANN-FILTER CU 3944 has Length [mm]: 390 mm, Width [mm]: 150 mm, Height [mm]: 20 mm. The MANN-FILTER CU 14 001 may differ in dimensions, fitting position, or material composition. Always verify compatibility with your specific vehicle using our vehicle selector, or contact our customer service team for assistance.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
