TSBs

Checking Porsche e-box for water intrusion

May 20, 2025

This bulletin applies to 2019-2022 Porsche Macan vehicles.

Mike Mavrigian

Related To:

Mitchell 1

The blue arrows show you where to inspect for traces of water.

Inspect for traces of water on the bottom side of the e-box.

This bulletin applies to 2019-2022 Porsche Macan vehicles. The vehicle may store faults, including the following:

052284/052204 (PSM)

C12085/C1209D (all-wheel drive transfer box)

U010000 (transmission electronics...PDK)

C12002 (various ECUs...no communication with engine electronics control unit DME); U111100 (date bus – fault value received from DME control unit).

Other faults for loss of communication with PSM, DME and AWD.

This condition may be the result of water entering the e-box and causing corrosion on the contacts or splices. Open the e-box and look for evidence of water intrusion.

Remove existing corrosion from the splices and wiring and re-attach to the e-box. Note: It is necessary to replace the e-box cover.

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.