Diesel Exhaust Fluid (DEF) Hoses

Replacement Parts > Emission Control > Emission Components

Diesel Exhaust Fluid (DEF) Hoses

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What is a Diesel Exhaust Fluid (DEF) Hose?

A Diesel Exhaust Fluid (DEF) Hose is a hose that connects the DEF storage tank to the DEF injector. The hose is typically made of a reinforced nylon, rubber, or plastic material.

What is the purpose of a Diesel Exhaust Fluid (DEF) Hose?

The purpose of a Diesel Exhaust Fluid (DEF) Hose is to carry the DEF from the storage tank to the injector, ensuring that the DEF is delivered properly for emissions control.

How do I determine if my Diesel Exhaust Fluid (DEF) Hose is faulty?

Symptoms of a faulty Diesel Exhaust Fluid (DEF) Hose may include:

  1. An increase in DEF fluid consumption
  2. Leaking DEF fluid at the hose connection
  3. Poor performance of DEF fluid delivery


Can a faulty Diesel Exhaust Fluid (DEF) Hose cause damage?

Yes, if left unchecked, a faulty Diesel Exhaust Fluid (DEF) Hose can cause damage to the DEF system, such as a leak in the DEF storage tank or injector.

How do I replace a Diesel Exhaust Fluid (DEF) Hose?

To replace a Diesel Exhaust Fluid (DEF) Hose:

  1. Disconnect the DEF storage tank from the vehicle.
  2. Unscrew and remove the old DEF hose from the connection points.
  3. Install the new DEF hose by screwing it into the connection points.
  4. Connect the DEF storage tank to the vehicle.