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Details
| Specification | Value |
|---|---|
| Brand | HENGST FILTER |
| MPN | e420ls |
| Height [mm] | 448 mm |
| Inner Diameter [mm] | 170 mm |
| Outer Diameter [mm] | 202.5 mm |
OE numbers (5)
Where this part fits
Original-fit position for OE 1665937. The red ring marks where this part installs on the vehicle.
About this product
Sourced from HENGST FILTER, this secondary air filter (E420LS) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Height [mm]: 448 mm, Inner Diameter [mm]: 170 mm, Outer Diameter [mm]: 202, Rubber mm, Filter type: Stainless Steel — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. This part supersedes original equipment references: 0 986 626 781, 1501262, 1513810, 1534632 and 38 more. Matching these numbers confirms a like-for-like replacement with no loss of function. HENGST 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 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 (37)
Show all 37 OE numbers
Secondary Air Filter HENGST FILTER E420LS — compatible car models
| Manufacturer article number (MPN) | E420LS |
|---|---|
| OE part numbers | 1665937, 1665937-7, 1674100, 21041297, 3162323 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
HENGST FILTER e420ls . Filter type: 9. Height [mm]: 448 mm. Inner Diameter [mm]: 170 mm. Outer Diameter [mm]: 202,5 mm
- 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 HENGST FILTER Secondary Air Filter have?
This HENGST FILTER Secondary Air Filter has the following specifications: Height [mm]: 448 mm; Inner Diameter [mm]: 170 mm; Outer Diameter [mm]: 202,5 mm; Filter type: 9. 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: 1665937, 1665937-7, 1674100, 21041297, 3162323. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a Secondary Air Filter cost?
This HENGST FILTER Secondary Air Filter is available for £104.99. Secondary Air Filter prices vary depending on brand, specifications, and vehicle compatibility. HENGST 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 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 1665937?
Yes, this HENGST FILTER Secondary Air Filter is a direct replacement for OE part number 1665937. 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 HENGST FILTER E420LS the same as the HENGST FILTER E1007LS?
No, while both are Secondary Air Filter parts, they are different products. The HENGST FILTER E420LS has Height [mm]: 448 mm, Inner Diameter [mm]: 170 mm, Outer Diameter [mm]: 202,5 mm. The HENGST FILTER E1007LS 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.
