ZF 4644.331.141 FILLER NOZZLE for WG200/WG201 | OEM Genuine Part

Overview

The ZF 4644.331.141 FILLER NOZZLE is a precision-engineered fluid delivery component designed specifically for the WG200 and WG201 series transmissions. This OEM genuine part serves as the primary oil fill point, directing transmission fluid into the main sump through the TRANSMISSION HOUSING assembly. Manufactured to ZF’s exacting tolerances, the filler nozzle ensures proper fluid flow rates during service intervals and prevents contamination ingress. The SKU 4644.331.141 is a direct replacement for worn or damaged nozzles, maintaining the hydraulic integrity of the lubrication circuit.

Symptoms of Failure

• Transmission fluid leaking from the fill port area: A cracked or degraded filler nozzle allows oil to seep past the seal, leaving puddles under the vehicle after parking.
• Hard shifting or delayed engagement: Insufficient fluid delivery due to a blocked or deformed nozzle starves the valve body, causing erratic gear changes.
• Overheating transmission: Reduced oil flow from a failing nozzle leads to inadequate cooling, triggering thermal warnings during heavy loads.
• Air ingestion into the hydraulic system: A loose or broken nozzle draws air bubbles into the fluid, resulting in spongy shift feel and premature wear on clutch packs.

Technical Specifications

Compatibility

This filler nozzle is engineered for ZF WG series transmissions, specifically the WG180, WG200, and WG201 models. It interfaces directly with the TRANSMISSION HOUSING on these units. The part also fits select WG211 variants where the fill port geometry matches. Always verify the TYPE PLATE on your transmission to confirm compatibility before installation. The nozzle works in conjunction with the COVER PLATE to seal the fill opening against debris.

Related Components