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- 4149 140 1004 STIHL Filter Cover – Genuine OEM Part
Description
4149 140 1004 STIHL Filter Cover – Genuine OEM Part
The STIHL Filter Cover (4149 140 1004) is a genuine OEM air filter cover designed for use on select STIHL trimmers and long-reach hedge trimmers from specific engine serial numbers onward (serial number ranges apply).
This filter cover installs in the air intake / air filter housing area and is designed to protect the air filter while preventing dirt, dust, and debris from entering the engine. Replacing a cracked, broken, loose, or missing filter cover helps maintain proper air filtration, protects the carburetor and internal engine components, and supports reliable engine performance.
Manufactured to STIHL factory specifications, this OEM filter cover ensures correct fitment, secure installation, and long-lasting durability.
Product Details
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OEM Part Number: 4149 140 1004
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Brand: STIHL (Genuine OEM)
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Part Type: Filter Cover / Air Filter Cover
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Application: Air intake / filter housing area (varies by model)
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Condition: New Genuine OEM Part
Function
This OEM filter cover is designed to:
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Protect the air filter and filter housing
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Help prevent dirt and debris from entering the intake system
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Support proper airflow and consistent engine performance
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Replace cracked, broken, loose, or missing filter covers
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Maintain correct air filtration and extend engine service life
⚠️ A damaged or missing filter cover can allow dirt into the engine, leading to poor running, hard starting, and premature engine wear.
Verify Fitment (Recommended)
Before ordering, confirm:
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OEM part number 4149 140 1004
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Your STIHL model is listed below
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Your engine serial number meets or exceeds the range shown
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Part location matches your OEM parts diagram
⚠️ Always verify fitment by OEM part number and engine serial number for best accuracy.
Compatibility (Fits STIHL Models)
(Serial number range applies)
Hedge Trimmers / Long-Reach Units
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HL 91 K — Engine from serial number 516095589
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HL 94 K — Engine from serial number 516140932
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HL 94 — Engine from serial number 516140932
Trimmers / Brushcutters
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FS 94 R — Engine from serial number 516962085
Installation Notes
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Turn off engine and allow it to cool
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Remove the existing filter cover from the air filter housing
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Inspect the air filter and clean or replace if necessary
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Install STIHL OEM filter cover 4149 140 1004
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Ensure the cover seats properly and locks securely
⚠️ The cover must be fully seated to prevent unfiltered air from entering the engine.
Maintenance Tips
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Inspect the filter cover regularly for cracks or loose fitment
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Keep the air filter clean for optimal performance
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Replace damaged covers immediately to protect the carburetor and engine
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Use genuine STIHL OEM parts for correct fit and long-term reliability

