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DEF QUALITY SENSOR

The DEF (Diesel Exhaust Fluid) sensor plays a crucial role in the Selective Catalytic Reduction (SCR) system of heavy-duty trucks. It measures the level and quality of DEF in the storage tank and communicates this information to the engine control unit.

Customers should choose Advanced Truck Parts for their DEF sensor needs due to our commitment to quality and customer satisfaction. We offer a wide range of genuine DEF sensors for various heavy-duty truck makes and models, ensuring high-quality and reliable performance. Our experienced team provides expert guidance and support in selecting the right DEF sensor and addressing any technical inquiries. Moreover, we offer competitive pricing without compromising on quality, providing cost-effective solutions. With our comprehensive inventory, exceptional customer service, and dedication to delivering reliable DEF sensors, Advanced Truck Parts is the trusted choice for customers seeking accurate DEF level monitoring and optimal SCR system performance in their heavy-duty trucks.

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  • 2515985C2 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515985C2 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00

    Description: SENSOR, 15G, QLS 1% SSICondition: NewPart Number: 2515985C2 Brand: Navistar International Other OEM Part Numbers That Will Work: 70118...

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    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00
  • 2515987C1 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515987C1 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00

    Description: SENSOR, 15G, QLS 1% SSICondition: NewPart Number: 2515987C1 Brand: Navistar International Other OEM Part Numbers That Will Work: 70118...

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    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00
  • 2515985C1 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515985C1 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00

    Description: SENSOR, 15G, QLS 1% SSICondition: NewPart Number: 2515985C1Brand: Navistar International Other OEM Part Numbers That Will Work: 701187...

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    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00
  • 2515986C1 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515986C1 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00

    Description: SENSOR, 15G, QLS 1% SSICondition: NewPart Number: 2515986C1 Brand: Navistar International Other OEM Part Numbers That Will Work: 70118...

    View full details
    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00
  • 4254216C91 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    4254216C91 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00

    Description: SENSOR, 15G, QLS 1% SSICondition: NewPart Number: 4254216C91Brand: Navistar International Other OEM Part Numbers That Will Work: 70118...

    View full details
    $899.00
    $899.00 - $899.00
    $899.00
    $399.00
    $399.00 - $399.00
    $399.00
  • 2515991C3 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515991C3 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00

    Description: SENSOR, 15G, QLS 1% SSICondition: NewBrand: Navistar InternationalPart Number: 2515991C3 Other OEM Part Numbers That Will Work: 701157...

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    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00
  • 2515991C2 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515991C2 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00

    Description: Sensor, 15G, QLS 1% SSI Condition: New Part Number: 2515991C2 Brand: Navistar International Other OEM Part Numbers That Will Work: 701...

    View full details
    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00
  • 4087160C91 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    4087160C91 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00

    Description: 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit Condition: NewPart Number: 4087160C91Brand: Navistar International Other OEM Part Numbe...

    View full details
    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00
  • 2515991C1 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515991C1 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $845.00 - $845.00
    $845.00
    $845.00 - $845.00
    $845.00

    Description: SENSOR, 15G, QLS 1% SSICondition: NewPart Number: 2515991C1 Brand: Navistar International Other OEM Part Numbers That Will Work: 70115...

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    $845.00 - $845.00
    $845.00
    $845.00 - $845.00
    $845.00
  • 5012177R91 Genuine Navistar International® Def Head Unit Sensor - ADVANCED TRUCK PARTS

    5012177R91 Genuine Navistar International Def Head Unit Sensor

    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00

    Description: DEF Head Unit Sensor 15 Gal Tank QLS 1% with Cover 17x9x25 6lb (No Core Charge)Condition: New Brand: Navistar InternationalPart Number...

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    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00
  • 4254215C91 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    4254215C91 Genuine Navistar International 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00

    Description: 15 Gallon Def Tank Qls 1% Ssi Sensor Head Unit Condition: NewBrand: Navistar InternationalPart Number: 4254215C91  Other OEM Part Numb...

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    $899.00 - $899.00
    $899.00
    $899.00 - $899.00
    $899.00
  • 2515988C3 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    2515988C3 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 12 Gallon DEF Tank QLS Sensor Head UnitCondition: NewPart Number: 2515988C3Brand: Navistar International Other OEM Part Numbers That W...

    View full details
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 2515988C2 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    2515988C2 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 12 Gallon DEF Tank QLS Sensor Head UnitCondition: NewPart Number: 2515988C2Brand: Navistar International Other OEM Part Numbers That W...

    View full details
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 2515988C1 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    2515988C1 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 12 Gallon DEF Tank QLS Sensor Head UnitCondition: NewPart Number: 2515988C1Brand: Navistar International Other OEM Part Numbers That W...

    View full details
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 4254214C91 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    4254214C91 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 12 Gallon DEF Tank QLS Sensor Head UnitCondition: NewPart Number: 4254214C91Brand: Navistar International Other OEM Part Numbers That ...

    View full details
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 4163693C91 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    4163693C91 Genuine Navistar International 12 Gallon Def Tank Qls Sensor Head Unit

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 12 Gallon DEF Tank QLS Sensor Head UnitCondition: NewPart Number: 4163693C91Brand: Navistar International Other OEM Part Numbers That ...

    View full details
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 4086802C91 Genuine Navistar International 9.5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    4086802C91 Genuine Navistar International 9.5 Gallon Def Tank Qls Sensor Head Unit

    $999.00
    $999.00 - $999.00
    $999.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 9.5  Gallon Def Tank Qls Sensor Head Unit Condition: New  Part Number: 4086802C91  Brand: Navistar International Other OEM Part Number...

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    $999.00
    $999.00 - $999.00
    $999.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 4097723C91 Genuine Navistar International 9.5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    4097723C91 Genuine Navistar International 9.5 Gallon Def Tank Qls Sensor Head Unit

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: SENSOR, 9.5 GALLON, QLS WITH COVER   Condition: New  Brand: Navistar International Part Number: 4097723C91 Other OEM Part Numbers That...

    View full details
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 4254213C91 Genuine Navistar International 9.5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    4254213C91 Genuine Navistar International 9.5 Gallon Def Tank Qls Sensor Head Unit

    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: SENSOR, 9.5 GALLON, QLS WITH COVER    Condition: New Brand: Navistar International Part Number: 4254213C91 Other OEM Part Numbers That...

    View full details
    $699.00 - $699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 2515989C3 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515989C3 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit Condition: NewPart Number: 2515989C3Brand: Navistar International Other OEM Part Numbers...

    View full details
    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 2515989C2 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515989C2 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit Condition: NewPart Number: 2515989C2Brand: Navistar International Other OEM Part Numbers...

    View full details
    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 2515989C1 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    2515989C1 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit Condition: NewBrand: Navistar InternationalPart Number: 2515989C1 Other OEM Part Numbers...

    View full details
    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 4254211C91 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit - ADVANCED TRUCK PARTS

    4254211C91 Genuine Navistar International 7 Gallon Def Tank Qls 1% Ssi Sensor Head Unit

    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00

    Description: 7 Gallon Def Tank Qls 1% Ssi Sensor Head UnitCondition: NewPart Number: 4254211C91Brand: Navistar International Other OEM Part Numbers...

    View full details
    $1,699.00
    $1,699.00 - $1,699.00
    $1,699.00
    $699.00
    $699.00 - $699.00
    $699.00
  • 2515990C1 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit - ADVANCED TRUCK PARTS

    2515990C1 Genuine Navistar International 5 Gallon Def Tank Qls Sensor Head Unit

    $544.00 - $544.00
    $544.00
    $544.00 - $544.00
    $544.00

    Description: 5 Gallon Def Tank Qls Sensor Head UnitCondition: NewPart Number: 2515990C1Brand: Navistar International Other OEM Part Numbers That Wi...

    View full details
    $544.00 - $544.00
    $544.00
    $544.00 - $544.00
    $544.00

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