DEF Cap
$20.93
BFNG
Part # DEF104
4.7(47 reviews)DEF Cap
Fits Freightliner — 383 vehicle applications
$65.47
Only 5 left in stock
1
Express Checkout
Free ShippingOrders $99+
WarrantyManufacturer backed
Easy Returns30-day policy
Canadian OwnedShipped across Canada
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BFNG DEF104 Vehicle Fitment
Fits 383 vehiclesThis DEF Cap fits Freightliner vehicles.
2019 Freightliner Sport Chassis
2018-2020 Freightliner B2
2017 Freightliner S2C
2015-2017 Freightliner XC Lowered Rail
2015-2017 Freightliner XC Modular Rail
2015-2017 Freightliner XC Raised Rail
2015-2017 Freightliner XC Straight Rail
2014-2019 Freightliner 122SD
2012-2019 Freightliner 108SD
2012-2019 Freightliner 114SD
2011-2019 Freightliner MT45
2011-2019 Freightliner MT55
2010-2021 Freightliner Cascadia
2010-2019 Freightliner M2 106
2010-2019 Freightliner M2 112
2010-2016 Freightliner Coronado
2010-2012 Freightliner Columbia
2010-2011 Freightliner Argosy
2010-2011 Freightliner Century Class
2010-2011 Freightliner Classic
BFNG DEF104 Specifications
- Thread Diameter
- 58.17 mm
- 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
- 2.29 in
- Material
- Metal, Plastic, Rubber
- Material
- Plástico, caucho, metal
BFNG DEF104 Interchange Numbers
This part replaces and is compatible with the following part numbers
Interchange Numbers
DEF104DEF1049DEF10410525DEF104DEF104703-550410525DEF104
BFNG DEF104 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
- Constructed from high- quality, heat-resistant materials for long-life durability
- Meets or exceeds all OEM specifications
- Important replacement item to pass inspection in certain states
- Designed for optimum fit
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 DEF104. 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 DEF104
What vehicles does the BFNG DEF104 fit?
The BFNG DEF104 fits 20 vehicle applications including 2010-2021 Freightliner Cascadia, 2018-2020 Freightliner B2, 2010-2019 Freightliner M2 106, 2010-2019 Freightliner M2 112, 2011-2019 Freightliner MT45 and 15 more. Check the full fitment list above to confirm your vehicle.
What parts does the BFNG DEF104 replace?
The BFNG DEF104 is a direct replacement for DEF104, DEF104, 9DEF104, 10525, DEF104 and 4 other part numbers. See the full interchange list for all compatible replacements.
What are the shipping options for the BFNG DEF104?
Shipping options for the BFNG DEF104 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 DEF104 cost?
The BFNG DEF104 is currently listed at $65.47 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.
