For the environment and your wallet - retrofit EURO 6 SCR catalytic converter

Recently updated on July 23, 2022 at 03:49 am

In the interests of environmental protection, emissions standards are becoming ever stricter. Now driving restrictions also threaten for older diesel vehicles that do not comply with the exhaust emission standard EURO 6. In order to allow the owners of these cars to avoid this, several vendors have developed retrofit kits that meet or even undercut the prescribed maximum values ​​for EURO 6.

Which possibilities and alternatives?

Usually, an SCR catalyst is retrofitted, which injects urea solution into the drive train. However, it only works from a temperature of about 220 degrees. For a cold start and / or low engine load exhaust emissions are therefore rather poor in this solution.
The BNOx SCR system avoids this problem by interposing a heated electric generator. The generator vaporizes the urea solution and then injects it into the drive train. In both systems, however, regular replenishment of the urea is required.

Tip: even more SCR cat information Is there ... here!

An alternative to retrofitting the catalyst is the post-cleaning This ammonia is used, which must be refilled from time to time in solid form. It is gasified by heating during operation and introduced into the exhaust gas. There it leads to the decomposition of the pollutant NOx. An advantage of this solution is that no intervention in the engine itself or the software is necessary. By adapting the software, you can avoid the annoying refilling of urea solution or ammonia. Here, the programming of your car is changed so that even at low temperatures an exhaust aftertreatment takes place. However, this leads to increased engine wear and reduces the life of your car.

Is the retrofitting useful?

The SCR-Kat retrofit is very expensive and you should therefore first consider whether it is actually worthwhile. If your car is already old, it might be more financially preferable to buy a new, already EURO 6 compliant, car. Before you set up the cost-benefit calculation, however, you should inquire whether you might be eligible for financial support. Several manufacturers have already agreed to contribute up to 3.000,00 EUR to conversions. However, these commitments mostly only apply to EURO 5 compliant models and especially to drivers of vehicles in cities that are banned from driving. Maybe it's worth it to wait a while, if there are no subsidies from the manufacturer of your car yet.

is there an operating permit for your car?

Also check whether the retrofitting you are planning already has a general operating permit from the Federal Motor Transport Authority. The operating license is absolutely necessary for maintaining the registration of your vehicle. Therefore, the premature installation of an SCR catalytic converter that has not yet been approved for your vehicle model could lead to a complete driving ban instead of avoiding driving bans. Your car without an SCR catalytic converter was not optimized for an SCR system back then.

Info: This is how AdBlue is deactivated!

If you now make changes, as you inevitably have to do when retrofitting, then you often have to reckon with performance losses or other problems such as poorer running smoothness. In addition, there is often increased fuel consumption and greater energy requirements. Depending on the vehicle model and the type of solution chosen, other structural changes are also necessary, which you may have to get used to. It is best to inquire about the changes in your workshop.

We hope that you the info report on the topic / term SCR catalyst (further names / keywords: BNOx SCR system, Euro-6, NOx reduction, Blue Plaque, Euro-6 conversions, AdBlue) from the field of auto-tuning. Our goal is that the largest German-language tuning dictionary (Tuning Wikipedia) and to explain tuning terms from A to Z easily and understandably. Almost every day we expand this encyclopedia and how far we are already can you HERE see. Soon the next one will be Tuning scene concept be illuminated by us. Incidentally, you will be informed about new topics if you have ours Feed subscribe to.

Below are a few examples from our tuning lexicon:

But of course tuningblog has countless other articles on the subject of cars & car tuning in stock. Do you want to see them all? Just click HERE and look around. But we also want to provide you with news outside the tuning. In our category Tips, products, information & Co we pick up contributions from car or accessory manufacturers. And also our category Test sites, laws, offenses, information has almost daily new information for you. Here are a few topics from our tuning wiki:

"Tuningblog.eu" - we keep you up to date on the subject of car tuning and car styling with our tuning magazine and present you the latest tuned vehicles from all over the world every day. It's best to subscribe to ours Feed and will automatically be informed as soon as there is something new for this post, and of course also to all other contributions.