NHTSA service bulletin

NHTSA Service Bulletin 10171446: 2020 Lexus Is 300

Official manufacturer communication context for 2020 Lexus Is 300, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.

NHTSA service bulletin 10171446 summary graphic for 2020 Lexus Is 300
10171446NHTSA document ID
Technical service bulletincommunication type
2affected product rows
90/100quality score

Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.

Quick answer

TSB: REVISION NOTICE January 15, 2020 Rev1: ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. Hybrid vehicles are equipped with two types of batteries: ? Hybrid Vehicle (HV) battery ? Auxiliary (12V) battery If the vehicle is put into storage, the State-Of-Charge (SOC) of its HV battery and auxiliary battery will gradually decrease. To prevent the auxiliary battery from becoming discharged during storage, proper maintenance is necessary. Perform the following maintenance service for the HV battery and auxiliary battery. NOTE ? Before disconnecting the auxiliary battery, confirm the shift lever is in the ?P? position and apply the parking brake completely. The shift lever cannot be shifted from the ?P? position with the auxiliary battery disconnected. ? If the negative terminal of the auxiliary battery is reconnected, even if the power switch is selected to the Start mode, the hybrid system may not start. In this case, push the Power switch to select Start again to start the hybrid system (the Ready light is ON). If the hybrid system still does not start (the Ready light is OFF), refer to the Repair Manual. ? If the vehicle is equipped with VGRS, the system must be initialized after the auxiliary battery has been reconnected. Refer to the applicable Service Bulletin for instructions.

What this bulletin may mean before buying

Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.

Affected products listed in this communication

MakeModelModel yearsBuyer note
LexusIs 3002020Ask for service records and run the exact VIN before purchase.
LexusLs Hybrid2020Ask for service records and run the exact VIN before purchase.

Buyer checklist

  1. Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
  2. Check recall campaign pages for safety actions that may require dealer repair.
  3. Compare this bulletin with common problem pages for the same model and component area.
  4. Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
  5. Use the used-car buying checklist and get an independent inspection.

Frequently asked questions

What is NHTSA service bulletin 10171446?

TSB: REVISION NOTICE January 15, 2020 Rev1: ? The entire bulletin has been updated. Any previous printed versions of this bulletin should be discarded. Hybrid vehicles are equipped with two types of batteries: ? Hybrid Vehicle (HV) battery ? Auxiliary (12V) battery If the vehicle is put into storage, the State-Of-Charge (SOC) of its HV battery and auxiliary battery will gradually decrease. To prevent the auxiliary.

Is a service bulletin the same as a recall?

No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.

How should a used-car buyer use this bulletin?

Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.

Check the exact VIN before you buy

Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.

Get Full Report