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Service bulletin AC00299

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 id604644
Published by NHTSA1999-05-07
Manufacturer's numberAC00299
Manufacturer's date1999-02-26
NHTSA componentVISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

NHTSA's summary

PRODUCTION CHANGES TO THE COWL TOP LOUVER AND HEATER UNIT HAVE BEEN MADE TO IMPROVE RESISTANCE TO SNOW ENTRY INTO THE HEATER UNIT AND IMPROVE DURABILITY OF AIR MIX DOOR ON VEHICLES WITHIN CERTAIN VIN RANGES. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Glass, wipers and mirrors, Heating and air conditioning

Vehicles listed
TOYOTA 4 RUNNER1996, 1997, 1998
TOYOTA TACOMA1996, 1997, 1998

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
T-TT-0269-132018-04-02. Service bulletin. The appearance of spots in tempered glass (when viewed at certain angles) is the result of the heat treating and quick quenching process during manufacturing.
TS-BO030-01 Obso2018-04-02. Service bulletin. This bulletin is now obsolete. Please see T-SB-0185-13.
T-SB-0185-132018-04-02. Service bulletin. The following procedures are recommended during routine maintenance or in the event of a customer concern for wiper performance.
1162001-09-17. Service bulletin. ELECTRONIC MAIL REGARDING EXTERIOR MIRROR ASSEMBLY. *TT
BO012002000-05-23. Service bulletin. INFORMATION INTRODUCING CHANGES MADE TO IMPROVE THE ADJUSTABILITY OF THE DRIVER'S SIDE EXTERIOR REAR VIEW MIRROR ON VEHICLES STARTING WITH VIN 4TAWN72N9XZ564100. *TT
AC001981998-05-29. Service bulletin. CONDITION WITH A/C INDICATOR LIGHT OPERATION IN DEFROSTER MODE. *YC
970829AX0071998-04-07. Service bulletin. INFORMATION AND PROCEDURES ON RUNNING BOARD INSTALLATION. *YC
971205006971998-03-30. Service bulletin. IMPROVEMENT OF THE A/C SUCTION HOSE. *YC