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Service bulletin No. 18-20

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10238793
Published by NHTSA2023-07-06
Manufacturer's numberNo. 18-20
Manufacturer's date2023-06-29
NHTSA componentENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE AND ENGINE COOLING

NHTSA's summary

Installation and conversion instructions for the sport exhaust system on the Panamera.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Exhaust and emissions

Vehicles listed
PORSCHE PANAMERA2021, 2022, 2023
PORSCHE PANAMERA 42021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 EXECUTIVE2021, 2022, 2023 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

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GR13D8022026-09-04. Service bulletin. Parts Information for Parts Withdrawal - Coolant Regulator Housing
No. 2304-22026-09-04. Service bulletin. Information on Advanced Technical Information for E3.I/G2 V8 – Oil/Air Separator Membrane Failure
No. 50-26-22026-09-04. Warranty extension. Update to Warranty Information: Warranty Extension for Additional Coolant Pump
49/262026-08-06. Service bulletin. Noises After a Cold Start of the Engine Due to Camshaft Actuator (SY 49/26)