What are the Signs of AdBlue® Expiration?

Apr 26, 2024

As with any other chemical, AdBlue® also has a shelf-life limit. It is important to understand the signs of expired AdBlue® and its potential impact on vehicle performance. Here is an in-depth discussion on this topic:

AdBlue® Shelf Life

The shelf life of DEF is specified in the ISO 22241-3 standard. Although not prone to degradation, AdBlue® has a shelf life limit that needs to be considered. The storage temperature of DEF ranges from 10°C to 35°C. At constant temperatures up to 30°C the product will last a minimum of 12 months, while at constant temperatures up to 35°C, the shelf life is reduced to a minimum of 6 months.

Proper storage involves a place that is cool, dry, and protected from direct sunlight. When stored under ideal conditions, AdBlue® can maintain its quality for a long period of time. Since the shelf life of AdBlue® varies, the manufacturer of AdBlue® should include at least the production date on each package.

Signs of AdBlue® Expiration

AdBlue® that has expired may show some signs that need to be watched out for. One of the most obvious signs is discoloration. Fresh AdBlue® has a clear or slightly blue color, whereas if it has expired, the color may turn darker or become yellowish. This discoloration indicates a degradation in the composition of AdBlue® which may affect its performance.

In addition, an unusual odor may also be an indication of expired AdBlue®. New AdBlue® generally does not have a noticeable odor. If it smells pungent, unpleasant or fishy, it could be that the AdBlue® has degraded and is no longer effective in reducing vehicle emissions.

Impact of Using Expired AdBlue®

The use of expired AdBlue® can have a negative impact on vehicle performance. Expired AdBlue® can damage SCR system components in vehicles, such as catalysts and sensors. This can result in significant repair costs and compromise overall engine performance. AdBlue® that is no longer effective in reducing nitrogen oxide (NOx) levels can lead to increased emissions that potentially violate environmental emission standards.

Therefore, it is important for diesel vehicle owners to pay attention to the shelf life of AdBlue® and its signs of expiration. Checking and replacing AdBlue® regularly is an important preventive measure to maintain vehicle performance and ensure compliance with environmental regulations.