Begin with the steering system and engine, before the shape of a replacement pump. The assembly discussed here is for the listed ZG/ZH CW5W 2.4L 4B12 petrol hydraulic application, within 11/2006–10/2012. It is supplied with a pulley.
That scope does not establish a match for the 3.0L V6 or a later electric steering system. A model badge, similar body or broad aftermarket search result should not override the stated configuration.
Make the original unit identifiable
The ZG/ZH 2.4L hydraulic steering pump uses reference 4450A107. Check the VIN, build month, engine code and original reference, and take accessible photographs of the complete unit and its connections.
A useful photograph shows the pulley and mounting arrangement in the same frame. A second view can show the inlet tube, pressure outlet and electrical terminal. If a connection is hidden, ask for that detail instead of declaring a match from the front face alone.
A pulley does not replace the connection checks
Compare pulley grooves and offset with the original, together with the cast housing and mounting holes. The inlet tube and pressure outlet also need to agree. The electrical terminal is another comparison feature; do not infer a pinout or test procedure from its appearance.
The photograph is a configuration reference, not a scale drawing. It does not supply an unlisted groove count, pulley dimension, pressure specification or electrical reading.
Check the package before arranging the repair
The pulley is included in this selected offer. A reservoir and hoses are not included. Tell the installer exactly which assembly is being supplied so any additional requirements can be determined separately.
Do not assume that an adjacent component, visible on the vehicle or in another seller’s photograph, is part of this package. Keep the actual inclusion statement with the exact part reference.
What to send for confirmation
Send the VIN, build month, CW5W/4B12 identification, original pump reference and the complete and connection photographs. Mention any engine, steering-system or mounting changes. If the vehicle or original unit differs from the selection above, leave the fitment unresolved until it is checked.
These comparisons do not diagnose a steering complaint. Use the workshop’s fault finding and vehicle-specific service information for the repair and commissioning requirements.
Prepared from application records and the linked product photographs. The featured workshop scene is an AI-generated editorial illustration. Information reviewed on 3 November 2026.