MAHLE LX 3997 Air Filter for Royal Enfield Classic 500 EFI / UCE | OE Ref 581007/A

MAHLE LX 3997 Air Filter for Royal Enfield Classic 500 EFI / UCE

The MAHLE LX 3997 is a branded replacement engine air-filter element catalogued by MAHLE specifically for the Royal Enfield Classic 500. It is intended for customers looking for a recognised aftermarket filtration brand while retaining the motorcycle's original air-box arrangement.

MAHLE lists this application with the Purolator reference 2278ELI99. For Royal Enfield parts identification, 581007/A is the OE air-filter element reference used in the Classic 500 filter-box assembly.

Key Product Details

• Brand: MAHLE
• MAHLE Part Number: LX 3997
• Purolator Reference: 2278ELI99
• Royal Enfield OE Reference: 581007/A
• Product: Engine Air Filter / Air Cleaner Element
• Primary Application: Royal Enfield Classic 500 EFI / UCE
• Pack Quantity: 1 Air Filter
• Type: Branded aftermarket replacement; not supplied as a Royal Enfield Genuine Parts item

Confirmed MAHLE Application

• Royal Enfield Classic 500

MAHLE's filtration catalogue assigns LX 3997 / 2278ELI99 to the Royal Enfield Classic 500. The Royal Enfield parts catalogue separately identifies 581007/A as the air-filter element in the Classic 500 filter-box assembly.

OE Reference for Customer Verification

581007/A is provided as an OE cross-reference to help customers verify the correct air-filter family before ordering. It is also found in Royal Enfield 500 EFI parts information, but this MAHLE listing is kept deliberately focused on the Classic 500 because that is the application explicitly listed by MAHLE for LX 3997.

The OE number is for fitment identification only. The supplied product is MAHLE LX 3997 and is not a Royal Enfield Genuine Parts packaged filter.

Why Replace the Air Filter?

• Helps reduce dust and debris entering the engine intake.
• Supports clean airflow through the stock air-box system.
• Suitable for routine service replacement when the existing filter is dirty, damaged or clogged.
• A practical branded replacement option for older Classic 500 motorcycles still in regular use.

Before Ordering

Please verify the motorcycle and part reference before purchase:

1. Motorcycle: Royal Enfield Classic 500 EFI / UCE.
2. MAHLE reference: LX 3997.
3. Purolator reference: 2278ELI99.
4. Royal Enfield OE air-filter reference: 581007/A.

If your motorcycle has a modified air box, a different-market specification, or a previous-owner intake conversion, compare the existing filter before ordering.

Package Contents

1 × MAHLE LX 3997 Air Filter Element

Installation Note

Install the filter in the original air-filter housing with the sealing surfaces correctly seated. If there is any doubt about model generation or air-box configuration, have the part matched by a competent mechanic before installation.