Diesel Exhaust Fluid (DEF) Tanks

Replacement Parts > Emission Control > Emission Components

Diesel Exhaust Fluid (DEF) Tanks

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What is a Diesel Exhaust Fluid (DEF) Tank?

A Diesel Exhaust Fluid (DEF) Tank is an emissions-control component that holds a mixture of urea and deionized water to reduce nitrogen oxide (NOx) levels in diesel engines.

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

The purpose of a Diesel Exhaust Fluid (DEF) Tank is to reduce nitrogen oxide (NOx) levels in diesel engines, which helps improve air quality.

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

You can determine if your Diesel Exhaust Fluid (DEF) Tank is faulty by looking for signs of leakage, corrosion, or damage. Other signs include a check engine light being illuminated or a warning message appearing on the dashboard.

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

Yes, a faulty Diesel Exhaust Fluid (DEF) Tank can cause damage. If the tank is leaking, it can cause fluid to leak into the engine, which can damage the engine or cause it to fail.

How do I replace my Diesel Exhaust Fluid (DEF) Tank?

To replace your Diesel Exhaust Fluid (DEF) Tank, you will need to:

  1. Drain the remaining fluid from the tank.
  2. Disconnect the electrical connector.
  3. Remove any mounting hardware.
  4. Remove the old tank and replace it with the new one.
  5. Re-connect the electrical connector.
  6. Refill the tank with Diesel Exhaust Fluid (DEF).


How often should I inspect my Diesel Exhaust Fluid (DEF) Tank?

It is recommended that you inspect your Diesel Exhaust Fluid (DEF) Tank at least once a year or every 10,000 miles, whichever comes first.