A 318i badge is not the complete coolant-tank application record. The selected E46 offer is restricted to the sedan with the 1.9L M43 petrol engine, within 07/1998–08/2001.
The later 2.0L N42/N46 318i tank is outside this selection. Confirm the actual engine and build month before relying on an E46 or 318i heading in a broad search result.
Keep the references within the stated engine scope
The E46 M43 tank with cap and level sensor lists references 17117573780 and 17137787040. Use them with the restricted application above, not as a reason to assume every 318i build uses this package.
Send the VIN and original reference for confirmation, particularly around a model or engine change. Mention any previous engine or cooling-system modifications.
Compare the original connections and mounting arrangement
Match the reservoir shape, filler neck, hose connections, mounting arrangement and original level-sensor connection. A long black reservoir with a similar cap is not a complete physical match.
Use corresponding full and underside views. If a port or retaining feature is obscured, ask for a detail image. Do not infer an unlisted connection size, cap rating or sensor pinout from appearance.
Check the cap-and-sensor package
The selected supply contains one tank with cap and level sensor. Hoses, coolant and vehicle mounting hardware are excluded. The installer should confirm any additional items required for the diagnosed repair.
Read the inclusion statement alongside any loose pieces in the photograph. Do not assume that every vehicle fitting is supplied, or that a new sensor establishes the cause of a warning.
Make an uncertain match reviewable
Provide labelled photographs of the complete original tank, outlets, mounting and sensor connection together with the VIN, build month and engine code. Keep fault diagnosis and the vehicle-specific service procedure separate from the parts-identification comparison.
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.