Mercedes Sprinter DEF Pump – Genuine OEM | VS30 All Diesel Engines | #099470740064 (2019–2025)

A failed DEF pump on a VS30 Sprinter stops AdBlue delivery to the SCR catalyst entirely — triggering fault codes, disabling the emissions reduction system, and eventually putting the van into a power-restricted limp mode that won't clear until the pump is replaced and the system recalibrated. This is the Genuine Mercedes-Benz OEM diesel exhaust fluid pump for VS30 Sprinters equipped with the 3.0L OM642, 2.1L OM651, or 2.0L OM654 diesel engine, a direct replacement that restores precise AdBlue metering and full SCR system operation.

What This Part Does

The DEF pump — also called an AdBlue pump or SCR dosing pump — draws diesel exhaust fluid from the DEF tank and delivers it at precisely metered quantities to the AdBlue injector upstream of the SCR catalyst. The ECU calculates the required dosing rate based on engine load, exhaust temperature, and NOx sensor feedback, then commands the pump to deliver that exact volume. AdBlue sprays into the hot exhaust stream where it converts to ammonia, which reacts with nitrogen oxides in the SCR catalyst to reduce them to harmless nitrogen and water. The pump also contains a reverse-flow function that purges residual AdBlue from the lines after engine shutdown to prevent crystallization in the injector and lines — a critical function in cold climates where AdBlue freezes below 12°F (-11°C). When the pump fails mechanically or electrically, dosing stops, NOx emissions rise, and the system enters fault mode.

Common Symptoms of a Failing DEF Pump

• AdBlue warning light or DEF system fault message in the instrument cluster
• Check engine light with fault codes related to SCR dosing, AdBlue pump circuit, or DEF pressure
• Engine entering limp mode or power restriction after extended DEF system faults
• AdBlue consumption that drops to zero with a full tank — a sign the pump has stopped drawing fluid
• SCR efficiency fault codes persisting after refilling the DEF tank and clearing codes

When to Replace

Replace when the pump is confirmed faulty by XENTRY or a compatible scan tool with active DEF pump or dosing circuit fault codes, and the AdBlue tank level, injector, and wiring have been ruled out as the source. After replacement, the SCR system must be recalibrated and the fault memory cleared with XENTRY to restore normal operation.

VS30 Specific — VIN Verification Required

This DEF pump fits VS30 Sprinters across all diesel engine configurations — 3.0L OM642, 2.1L OM651, and 2.0L OM654. It does not fit NCV3 Sprinters (2007–2018). Always verify by VIN before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2019–2025 Mercedes-Benz Sprinter 1500 – All diesel engines (VS30)
• 2019–2025 Mercedes-Benz Sprinter 2500 – All diesel engines (VS30)
• 2019–2025 Mercedes-Benz Sprinter 3500 – All diesel engines (VS30)
• 2019–2025 Mercedes-Benz Sprinter 3500XD – All diesel engines (VS30)
• 2019–2025 Mercedes-Benz Sprinter 4500 – All diesel engines (VS30)

✔ Fits OM642 (3.0L V6), OM651 (2.1L), and OM654 (2.0L) engine configurations ✔ Does NOT fit NCV3 Sprinters (2007–2018) ✔ SCR system recalibration required after replacement

Part Numbers

• Mercedes OEM: 099470740064 / A099470740064 / 099-470-74-00-64
• Manufacturer: Genuine Mercedes-Benz
• SKU: 099470740064OE