Replacing Porsche coolant reservoir

This bulletin applies to 2017-2018 Porsche Boxster vehicles. The red warning message “Refill coolant immediately! Do not drive on” may appear in the instrument cluster at times.
Aug. 12, 2025

This bulletin applies to 2017-2018 Porsche Boxster vehicles. The red warning message “Refill coolant immediately! Do not drive on” may appear in the instrument cluster at times. Due to an error during production of the “locking lug”, the electric plug connection on the coolant reservoir cannot be locked correctly.

In the event of a complaint and if the plug is loose, the coolant reservoir must be replaced. It is not enough to just reconnect the electric plug connection to the existing coolant reservoir. New reservoirs are available as P/N 982.121.407.C.

About the Author

Mike Mavrigian

Motor Age Editor

Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of  specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.

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