DEF Cap
$20.93
BFNG
Part # DEF105
4.7(47 reviews)DEF Cap
Fits Mack, Volvo — 315 vehicle applications
$61.84
Only 5 left in stock
1
Express Checkout
Free ShippingOrders $99+
WarrantyManufacturer backed
Easy Returns30-day policy
Canadian OwnedShipped across Canada
Will this fit your vehicle?
Select your vehicle to check fitment.
BFNG DEF105 Vehicle Fitment
Fits 315 vehiclesThis DEF Cap fits Mack, Volvo vehicles.
2020 Volvo VNX
2019-2020 Volvo VNR 300
2019-2020 Volvo VNR 400
2019-2020 Volvo VNR 640
2019 Volvo VAH 300
2019 Volvo VAH 640
2018-2020 Volvo VNR
2017-2020 Volvo VNL 400
2017-2020 Volvo VNL 740
2017-2020 Volvo VNL 760
2017-2020 Volvo VNL 860
2017-2019 Volvo VAH 430
2016-2020 Volvo VNL 300
2016 Volvo VNL 430
2016 Volvo VNL 630
2016 Volvo VNL 670
2011-2019 Volvo VAH
2010-2021 Volvo VNL
2010-2019 Volvo VHD
2010-2017 Volvo VNM
2010 Volvo VT
BFNG DEF105 Specifications
- Prop 65
- WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
- Prop 65
- ADVERTENCIA: Riesgo de cáncer y daños reproductivos - www.p65warnings.ca.gov
- Thread Diameter
- 68.07 mm
- Thread Diameter
- 2.68 in
- Material
- Metal, Plastic, Rubber
- Material
- Plástico, caucho, metal
BFNG DEF105 Interchange Numbers
This part replaces and is compatible with the following part numbers
Interchange Numbers
DEF105DEF1052114872821148725DEF105904-5502CD904-5502DEF1059DEF10510526DEF105703-550510526
BFNG DEF105 Product Description
Effectively prevent diesel exhaust fluid from leaking or spilling through the filler neck. Essential for helping to keep pollutants out of the environment. Replacement restores the diesel emissions fluid system to proper operation.
Key Features
- Designed for optimum fit
- Meets or exceeds all OEM specifications
- Important replacement item to pass inspection in certain states
- Constructed from high- quality, heat-resistant materials for long-life durability
Effectively prevent diesel exhaust fluid from leaking or spilling through the filler neck. Essential for helping to keep pollutants out of the environment. Replacement restores the diesel emissions fluid system to proper operation.
About BFNG
Shop BFNG Diesel Exhaust Fluid (DEF) Filler Cap at Autrex with vehicle fitment details, current pricing, and checkout options for the BFNG DEF105. Eligible orders over $99 may qualify for free shipping, with some exceptions.
Ratings & Reviews
4.7out of 5
Based on 47 reviews
- 538
- 46
- 31
- 21
- 11
- Direct fit, no surprisesMarc D.Verified BuyerMay 28, 2026
Lined up perfectly with the original. Install took about an hour with the right press. Solid feel back in the steering, no more clunk over bumps.
Installed on 2016 Ram 1500
- Shipped fast across CanadaJen P.Verified BuyerMay 14, 2026
Ordered on a Monday, had it by Wednesday in Calgary. Greasable fitting is a nice touch. Quality looks on par with OEM.
Installed on 2014 Chevrolet Silverado 1500
- Good part, double-check your sideSteve R.Verified BuyerApr 30, 2026
Works great so far. Just confirm fitment for your exact trim before ordering — the fitment list on the page was accurate for mine.
Installed on 2017 Ford F-150
- Quiet againAmrit S.Verified BuyerApr 19, 2026
Replaced both sides at the same time. The knocking noise is completely gone. Boot quality feels durable.
Installed on 2015 GMC Sierra 1500
- Would buy againDaniel L.Mar 22, 2026
Second one I've bought from Autrex. Packaging was secure and the part matched the photos exactly.
Installed on 2013 Dodge Durango
Frequently Asked Questions — BFNG DEF105
What vehicles does the BFNG DEF105 fit?
The BFNG DEF105 fits 34 vehicle applications including 2018-2021 Mack Pinnacle, 2010-2021 Volvo VNL, 2018-2020 Mack Granite, 2020 Mack Anthem, 2018-2020 Volvo VNR and 29 more. Check the full fitment list above to confirm your vehicle.
What parts does the BFNG DEF105 replace?
The BFNG DEF105 is a direct replacement for DEF105, DEF105, 21148728, 21148725, DEF105 and 8 other part numbers. See the full interchange list for all compatible replacements.
What are the shipping options for the BFNG DEF105?
Shipping options for the BFNG DEF105 are shown during checkout and may vary by item, address, and availability. Eligible orders over $99 may qualify for free shipping, with some exceptions. Call 1-866-461-2787 if you need help confirming shipping or pickup before ordering.
How much does the BFNG DEF105 cost?
The BFNG DEF105 is currently listed at $61.84 CAD at Autrex. Final price, shipping, taxes, and availability are confirmed during checkout. Call 1-866-461-2787 if you need help before ordering.
Is the DEF Cap a direct fit replacement?
Yes, the DEF Cap by BFNG is designed as a direct fit replacement. Use our vehicle selector to confirm compatibility with your specific vehicle.
What warranty does the DEF Cap come with?
The DEF Cap comes with the standard BFNG manufacturer warranty. Please check the product specifications for exact warranty terms.
