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Why are cars designed for AdBlue?

Model: (Various brands) Various
Part: AdBlue warning light

Video tutorial

In this video, see why modern cars are designed for AdBlue: they must comply with an emissions regulation called EURO 6, which sets the maximum limit that can only be met through SCR technology and the addition of the additive. If your vehicle has a small cap (usually blue) located near the diesel filler cap, it means it is equipped for this additive.

However, sometimes the filler neck is found in the engine bay or in the boot. The consumption of the additive is linked to the vehicle's usage and your driving style, but on average, it requires between 1 and 3 litres of AdBlue every 1,000 miles, and there is a specific warning light that indicates when it is low. The tank can typically hold between 5 and 10 litres of additive, depending on the vehicle.

The best way to avoid crystallisation is to keep the AdBlue tank as full as possible and not to wait until it is low to refill.


Updated on 5 September 2026 by ScegliAuto


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    Frequently Asked Questions

    • Vari - How much does it cost to replace the AdBlue tank? Read answer

How to Reset the Tyre Pressure Warning Light on a Kia Rio?

The tyre pressure warning light displayed on the instrument cluster of the Kia Rio can be reset by inflating the tyres until they reach the recommended pressure value: this value is indicated on the sticker affixed to the driver's door pillar. Once all tyres have been inflated to the recommended pressure, turn on the ignition to check that the light has disappeared: if it is still present, it may be necessary to drive for a few miles, allowing the sensors to work and thus turning off the light.

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by ScegliAuto

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