Diesel engines must meet strict emissions standards, and the Paccar MX13 SCR Filter (2018–2021, OEM 5418506) plays a crucial role in helping your engine achieve that goal. This Selective Catalytic Reduction (SCR) filter works with the DEF system to reduce harmful nitrogen oxides (NOx) in the exhaust, turning them into harmless nitrogen and water vapor. Using the correct OEM-spec SCR filter ensures your emissions system functions properly, helping maintain efficient operation and compliance over time.
This SCR filter contributes significantly to emissions control — here’s why it matters:
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Reduces Harmful Emissions – Supports the conversion of NOx gases into cleaner, environmentally safe components, improving exhaust quality.
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Supports Engine Emissions Compliance – A properly functioning SCR filter helps ensure the engine meets regulatory standards without triggering fault codes or warnings.
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Enhances System Efficiency – Proper filtration and catalysis help the SCR system work effectively, minimizing backpressure and sustaining smooth exhaust flow.
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OEM-Grade Fit and Durability – As OEM 5418506, this SCR filter is designed to match original specifications for size, materials, and performance, ensuring dependable long-term function.
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Prevents Emissions-Related Issues – Replacing a worn or congested SCR filter helps reduce the risk of engine derates, increased fuel use, or costly repairs tied to emissions system faults.
A worn or failing SCR filter can lead to reduced emissions performance, system warnings, or decreased engine efficiency. The Paccar MX13 SCR Filter (OEM 5418506) provides the OEM-standard reliability and emissions support needed to keep your engine running clean and efficiently. For those looking for a dependable replacement, Tamerx offers high-quality components engineered to maintain long-lasting emissions control and overall engine health.











