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Service bulletin TT 01 18 16

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 id10154077
Published by NHTSA2019-03-04
Manufacturer's numberTT 01 18 16
Manufacturer's date2018-12-14
NHTSA componentELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY

NHTSA's summary

Corrections after charging issues.

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

Electrical system, 12-volt battery

Vehicles listed
VOLKSWAGEN BEETLE2018
VOLKSWAGEN PASSAT2018
VOLKSWAGEN TIGUAN2018

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

Other bulletins for the same vehicles and component
V2719012011894242023-08-04. Service bulletin. Battery Testing and Charging using Midtronics VAS6161 and or GRX3000 Vas Charger
TT 27 20 02_32023-06-06. Service bulletin. Battery adaptation procedure when battery label is missing.
V2715032016076112022-04-06. Service bulletin. Discharged Battery, Diagnosis for excessive current draw.
TT 27 20 02_12021-01-08. Service bulletin. Battery Id for testing
V271902-20339782019-04-22. Service bulletin. Update to model year applicability. Generator Replacement Charging System inoperative/malfunctions, noise from engine compartment, accessory drive belt damaged or missing.
TT 2710022019-04-08. Service bulletin. Updated to include model year 2014 thru 2018 applicability.
TT 27 19 012019-04-08. Service bulletin. Start/Stop diagnosis.
TT 27 19 012019-04-01. Service bulletin. Start/Stop diagnosis.
TT 58 18 012018-12-10. Service bulletin. Key Battery Diagnostic Process
TT 57 18 022018-12-03. Service bulletin. Remote Ket battery diagnostics. Updated to change incorrect repair manual group number (from TT581801 to TT571802)