Service bulletins for the 2018 Toyota Sequoia
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.
199 on file from NHTSA, as of 2026-10-19.
About C1AB4 on the 2018 Toyota Sequoia: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: C1AB4 are shown. Show all
| T-SB-0021-18_Rev | 2018-07-16. Service bulletin. VISIBILITY; ELECTRICAL SYSTEM. TSB: REVISION NOTICE June 12, 2018 Rev1: ? The Production Change Information section has been updated. Any previous printed versions of this bulletin should be discarded. Some 2018 model year Sequoia vehicles equipped with Blind Spot Monitor (BSM) and auto-dimming mirrors may exhibit a BSM warning message in the combination meter immediately after engine startup and an inoperative BSM system with Diagnostic Trouble Codes (DTCs) C1AB4 (Open in Outer Mirror Indicator [Master]) or C1AB5 (Open in Outer Mirror Indicator [Slave]). Follow the Repair Procedure in this bulletin to address this condition. |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.