Description
P618239 Radial Seal Air Filter for Volvo B7R B8R B12R Diesel Bus — Premium Filtration
The P618239 radial seal air filter element is engineered for heavy duty diesel bus applications, providing premium filtration for Volvo B7R, B8R and B12R bus chassis. Featuring a high-efficiency radial seal design, this filter ensures optimal protection against contaminants, maintaining engine intake health and efficiency.
Key Takeaways
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Exact OE Replacement: Directly replaces P618239, 70320440, CP32001, AF27875, 49440 and CA5421.
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Vehicle-Specific Fit: Designed for Volvo B7R, B8R and B12R heavy duty diesel bus chassis.
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Premium Filtration: High-efficiency media captures contaminants and debris before they reach the engine.
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Radial Seal Design: Reliable sealing under high vibration and heavy load operation.
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Ready to Install: Single-piece element, no complex tools required.
Features & Benefits
| Feature |
Benefit (What It Means for You) |
| Radial Seal Design |
Ensures a reliable, leak-free seal under high vibration and extreme operating conditions, protecting the engine intake system. |
| High-Efficiency Media |
Captures contaminants and debris from intake air, preventing premature engine wear and maintaining power output. |
| Vehicle-Specific Fit |
Designed for Volvo B7R / B8R / B12R chassis — direct replacement, no modifications needed. |
| Heavy Duty Construction |
Built to withstand demanding fleet and coach operating environments, mile after mile. |
| OE Cross-Reference |
Replaces P618239, 70320440, CP32001, AF27875, 49440 and CA5421 — verified part number matrix. |
Compatibility & Cross-Reference
Replaces OE Part Numbers:
| Interchange Part Number |
Brand |
| FJ-AF8239 |
iFJF |
| P618239 |
OE |
| 70320440 / VOE70320440 |
Volvo OE |
| CP32001 |
OE |
| AF27875 |
OE |
| 49440 |
OE |
| CA5421 |
OE |
Common Applications:
- Volvo B7R bus chassis — fleet & coach service
- Volvo B8R bus chassis — fleet & coach service
- Volvo B12R bus chassis — fleet & coach service
Specifications
| Part Number |
FJ-AF8239 (iFJF) |
| Replaces |
P618239 / 70320440 / CP32001 / AF27875 / 49440 / CA5421 |
| Filter Type |
Radial Seal Air Filter Element |
| Application |
Volvo B7R / B8R / B12R diesel bus |
| Dimensions |
Approx. 312.9 mm OD x 208.1 mm length |
| Package Includes |
1 x air filter element |
Why Choose iFJF?
The iFJF Difference: Automotive-Grade Engineering & Quality
With over a decade of proven expertise supplying the North American market, iFJF delivers more than just replacement parts. 99% of our catalog, including this radial seal air filter, is fully engineered, manufactured, and lab-tested by iFJF. Our manufacturing facility operates under stringent ISO 9001 and IATF 16949 quality management systems — the highest, most rigorous standards in the automotive and industrial sectors. Furthermore, with select product lines adhering to ISO 14001 (Environmental) and OHSAS 18001 (Health & Safety) certifications, we ensure every filter delivers OEM-grade stability and world-class reliability.
Why Choose iFJF Over the OE Dealership?
1-Year Warranty Included · 30-Day Easy Returns · Lifetime Support
Not satisfied? Return it. Fails prematurely? We'll replace it — no receipt-hoarding, no dealership runaround.
As a professional filter manufacturer with a CNAS certified laboratory, we design and build our products to strictly match — and often exceed — OE specifications. Every single unit undergoes rigorous quality verification:
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Lab-Tested Performance: Validated for filtration efficiency, particle holding capacity and burst strength.
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100% Leakage Control: Factory-tested under high pressure to ensure zero leakage.
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Premium Build Quality: Advanced multi-layer media and heavy-duty components for harsh environments.
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Factory-Direct Supply: Commercial-grade quality directly from the manufacturer, no middleman markup.
Parts in stock and ready to ship from our US warehouse.
Looking for related upgrades? Check out the CA10261 diesel air filter here →
Want to see how our filters stack up against the genuine OEM? Read our filter comparison guide here →
Frequently Bought Together:
Browse More: All Air Filters Products → | All Filter Products →
Frequently Asked Questions
Q: How often should I replace this filter?
A: We recommend replacing the air filter every 12 months / 15,000 miles or according to your vehicle's maintenance schedule. For severe duty, high-mileage or heavy load operating environments, more frequent replacement is advised to prevent intake restriction.
Q: Will this fit my Volvo bus?
A: Yes, it is explicitly designed for Volvo B7R, B8R and B12R bus chassis. Please double-check your original OE part number against our Cross-Reference table before ordering. If you are unsure, feel free to contact us with your VIN.
Q: What is the benefit of the radial seal design?
A: The radial seal creates a positive, self-aligning seal between the filter and housing — no separate gasket required. It delivers reliable sealing under high vibration and heavy load operation, preventing unfiltered air from bypassing the element.
Q: Does this filter come with everything needed for installation?
A: Yes. This is a complete single-piece filter element with the radial seal built in — ready to install out of the box. No additional seals, gaskets or tools are required.
Q: What are the installation steps?
- Shut down the engine and allow it to cool completely.
- Open the air cleaner housing and remove the old filter element.
- Clean the sealing surface of the housing — no debris allowed.
- Install the new element in the same position and sealing direction as the original.
- Close and latch the housing securely, then start the engine and check for proper operation.
Q: Why should I trust an iFJF air filter over other aftermarket brands?
A: We bring over 10 years of specialized experience to the US aftermarket. Unlike brands that simply re-label generic parts, our air filters and filtration systems are fully engineered and manufactured by iFJF, a facility certified to strict ISO 9001 and IATF 16949 standards. This means your filter is built with the same rigorous quality control required for advanced automotive components. Backed by additional ISO 14001 and OHSAS 18001 global certifications across select lines, each element undergoes exhaustive filtration and sealing tests before it reaches your door.
Package Includes
- 1 x P618239 Radial Seal Air Filter Element
Common Problems with OE & Aftermarket Filters — Solved by iFJF
We analyzed verified customer reviews of OE and aftermarket alternatives. Here's what fleet owners keep complaining about — and how we fixed it:
| What Owners Complain About |
|
How iFJF Solved It |
"Seal fails under heat and vibration, causing air bypass."
— Common complaint in OE reviews
|
→ |
Radial seal tested for heavy duty operation
Self-aligning radial seal keeps a leak-free fit under high vibration, eliminating bypass and unfiltered intake.
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"Filter doesn't fit right — took force to install."
— Common complaint in aftermarket reviews
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→ |
Vehicle-specific fit for B7R / B8R / B12R
Dimension-matched to the OE element — drops in cleanly, no forcing, no gaps.
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"Filter media collapses early, engine loses power."
— Common complaint in aftermarket reviews
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→ |
High-efficiency multi-layer media
Robust media structure maintains flow while capturing contaminants and debris, keeping intake performance stable.
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We read the 1-star and 2-star reviews so you don't have to. Every iFJF product is engineered to solve the real problems owners actually face — not just match a spec sheet.
Factory Direct Supply & Wholesale — iFJF is a direct manufacturer of high-performance automotive and outdoor filtration systems. Custom specifications and bulk orders are highly welcome. Contact us for exclusive dealer pricing and volume discounts.
Email: support@ifjf.com
Backed by 10+ Years of Excellence & Global Certifications
Trusted across the US market, iFJF delivers precision-engineered solutions. Manufactured and strictly lab-tested by iFJF under ISO 9001 and IATF 16949 automotive-grade quality standards — with additional ISO 14001 and OHSAS 18001 compliance — we guarantee factory-direct reliability you can count on.
ISO 9001 · IATF 16949 · ISO 14001 · OHSAS 18001
