HIGHTEC SCR SYSTEM CLEANER is a specialist additive that dissolves the crystalline urea deposits forming in the metering systems of SCR exhaust aftertreatment. These hard white crystals build up where AUS 32 urea solution (such as AdBlue) is injected, causing dosing faults and warning messages. Added to the urea tank, the cleaner breaks down the crystals and restores reliable injection and catalyst performance.

Purpose and specifications

This product is designed for diesel vehicles with SCR catalytic converters and a urea dosing system running AUS 32 (AdBlue) solution. It removes crystalline deposits from the metering nozzle and lines, helping clear NOx-related fault codes and prevent blockages. As a service chemical it carries no vehicle-specific OEM approvals; it is simply added to the urea solution before the tank is refilled.

• 0.250L container dosed into the urea tank for a single cleaning treatment
• Dissolves hardened crystalline urea deposits in the dosing system
• Restores reliable AdBlue injection and SCR catalyst efficiency
• Helps clear dosing faults and avoid costly metering-unit repairs

When to use / change?

Use it when an SCR or AdBlue warning appears, when dosing faults are logged, or as preventive care on high-mileage diesels. Add the cleaner to the urea solution before filling so it circulates through the dosing system. It is a use-as-needed product rather than one with a fixed interval, and works across the normal operating temperature range of the exhaust system. Stored sealed and away from heat and direct sunlight, shelf life is approximately 5 years.

Frequently asked questions

Is it safe to add to AdBlue?
Yes. It is formulated to be mixed into AUS 32 urea solution before refilling, dissolving crystalline deposits without harming the SCR system.

Will it clear an SCR warning light?
If the fault is caused by crystallised urea in the dosing system, the cleaner can resolve it; persistent faults may need diagnosis.

When exactly do I add it?
Add it to the urea solution before filling the vehicle so it passes through the metering system.

Suitable for: all diesel vehicles with SCR system and AdBlue dosing. Always verify the exact approval against your vehicle's owner manual before use.