Ordering a CAT 373-8189 display starts with a readable part number. Copy the complete marking from the rear label, including any suffix, rather than relying on the description attached to a supplier photo.

Photograph the front and back of the removed unit. Keep those views together so the supplier can compare one display throughout the enquiry. Mixing pictures from two similar units can leave a quotation based on the wrong housing.
Note where the screen sits in the cab and include the equipment identification. Connector details and the way the housing mounts also need confirmation before a replacement is selected. Appearance alone does not settle compatibility.
If a label digit is unclear, send the original close-up instead of guessing it. Ask the supplier to identify any unresolved detail before confirming the order. Browse the display module range for other listings, keeping each part request separate.