3.20520 DT Filter

This filter’s job is pretty straightforward – it cleans the Diesel Exhaust Fluid, or DEF, before it goes into your emissions system. DEF isn't just fuel; it’s a carefully engineered solution of urea and water. The filter removes contaminants like particulate matter – think dust, rust, or anything else that could clog things up – so the DEF stays pure. It’s a simple job, but important. Now, modern diesel engines use DEF to reduce harmful nitrogen oxides, and it’s a critical part of meeting emissions standards. The DEF gets injected into the exhaust stream, and it breaks down those NOx gases into harmless nitrogen and water. This filter sits inline, protecting the whole DEF injection system – the pump, the injectors, everything – from getting damaged by dirty fluid. It essentially acts like a shield for those more expensive components. Honestly, if this filter gets clogged, things start to go wrong quickly. You’ll likely get a warning light on your dash – often related to the emissions system. The engine might lose power, or even go into a reduced performance mode to protect itself. A blocked filter can even cause DEF crystallization, which really messes things up. Replacing it is a relatively inexpensive bit of maintenance that can save you from a much bigger and pricier repair down the road. You can find these filters pretty easily, places like Fixparts Online usually stock a good range for different vehicles. It's best to replace it at the mileage recommended in your vehicle’s service schedule. You’ll notice if it's getting clogged, usually with a dashboard message or a slight change in how the engine runs. Stand out from the crowd: Diesel Exhaust Fluid Filter (MPN 3.20520) has a 12-month warranty!

About DT

Diesel Technic’s extensive range covers all essential components, ensuring cost-effective maintenance solutions.

Why Choose DT?

• We have a huge selection of parts, so you’re likely to find what you need, fast. • Our prices are competitive, meaning you get great value for your money. • We focus on quality parts that are built to last, saving you time and hassle. • Our customer service team is here to help – we'll get you the right parts and answer your questions. DT – trusted quality, available at FixParts Online!