★★★★★ 5
The quality it’s the best
Best filters ever bought I will buy it again
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Reviewed in the United States on March 22, 2026
BOS 21M-PA-LH23-S4BOS 21M PA LH23 S4 (BOS01Z9) PHOTOELECTRIC SENSOR BACKGROUND SUPPRESSION LIGHT EMITTER=LASER CONNECTION TYPE=CONNECTOR SWITCHING OUTPUT=PNP NORMALLY CLOSED (NC) PNP NORMALLY OPEN (NO) (PINS 4 2) RANGE MAX.=250 MM
Quick Dispatch:
Your BOS 21M-PA-LH23-S4 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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Product Reviews
★★★★★ 5
Recomendado 10/10
Fácil de instalar y se ve de buena calidad a comparación del que tenía en Valvoline por casi el mismo precio, compré este filtro para mi Civic 2017
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Reviewed in the United States on March 1, 2026
★★★★★ 1
Bad
Horrible air flow I don’t recommend and yes it was installed correctly. Don’t waste your money
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Reviewed in the United States on January 17, 2026
★★★★★ 5
Maintained airflow
Difficult to know how well it’s filtering the air. But it installed correctly and I am still getting good airflow through my vents
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Reviewed in the United States on February 8, 2026
★★★★★ 5
High-Quality Cabin Filter with Carbon Pre-Filter
This filter was easy to install in a 2010 Honda Fit. I wanted a HEPA filter given my severe allergies. The honeycomb carbon side looks similar to my Winix and Air Doctor carbon filters so it felt high quality.
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Reviewed in the United States on August 18, 2025
