The Bosch Air Filter S9404 is an automotive air filter designed to restore engine airflow and meet Original Equipment filtration standards. That brings reassurance for motorists who want dependable, long‑lasting parts that cope with heat, moisture and pressure. Would that match your vehicle's needs and workshop schedule?
⚡ At a Glance
- • Filtration Efficiency: High dust retention capacity and filtration efficiency matching Original Equipment parts
- • Best for: Drivers and mechanics seeking OE-quality replacement filters for routine maintenance
- • Not ideal for: Vehicles with non-standard or manufacturer-specific filters where compatibility cannot be confirmed
Accurate fit and high-quality sealing materials ensure clean intake air and efficient filtration. Specially impregnated media and embossed pleat geometry help the filter resist moisture and retain shape under heat and pressure.
Restore Engine Airflow - with accurate fit and high-efficiency filtration
Accurate fit and high quality sealing materials prevent bypass while filter media with high dust retention captures particulates to the standard of Original Equipment parts. Robust pleat geometry maintains effective surface area for airflow.
Improves combustion air quality and helps recover engine responsiveness and airflow after clogged or aged filters. Useful for drivers noticing reduced throttle response or rough idling.
Resist Harsh Conditions - thanks to specially impregnated filter media
Special impregnation increases moisture resistance and tensile strength of the filter media, and embossing of the media creates a pleat geometry that withstands heat and pressure. Construction matches tests applied to OE parts.
Maintains filtration performance in hot or humid environments and during heavy engine loads. Suitable for use where reliability under demanding conditions matters.
Deliver Long Service Life - with OE-standard testing and quality sealing
All functional and quality tests follow the same standards applied to Original Equipment parts, ensuring consistent performance and durability. High quality sealing materials reduce the risk of contamination ingress.
Offers the long service life expected by vehicle manufacturers, reducing replacement frequency when service intervals are observed. Good choice for routine maintenance and scheduled servicing.
✨ The 4 Key Reasons for Bosch Air Filter S9404
- Precision Fit - Ensures secure sealing and prevents unfiltered air entering engine
- Robust Construction - Handles heat and pressure without deforming in service
- Moisture-Resistant Media - Reduces risk of filter breakdown in damp conditions
- Simple Installation - Quick DIY fitment restores airflow and engine responsiveness fast
📋 Technical Details at a Glance
- Category: Automotive Parts and Accessories
- Brand: Bosch
- Model: S9404
- Type: Air filter (engine intake)
- Fitment: Accurate fit with high quality sealing materials
❓ Frequently Asked Questions
Q: How do I know if the Bosch S9404 fits my car?
A: Use your vehicle identification to confirm compatibility, and observe all listed restrictions before purchase.
Q: Can I install the filter myself?
A: Some users report easy, quick DIY installation, but the manufacturer guidance advises that work should be carried out by trained specialists for complex fitments.
Q: Will fitting the filter improve engine performance?
A: Users report restored engine performance and improved airflow after fitting, supported by the filter's accurate fit, high dust retention capacity and OE-level filtration.
🏆 Our Verdict
The Bosch Air Filter S9404 is well suited to motorists and workshops seeking an OE-quality replacement that restores airflow and protects the engine. High dust retention, moisture-resistant media and robust construction are the key strengths that support reliable performance. While initial outlay may be a consideration, long-term value comes from extended service life and reduced replacement frequency.
