# Service bulletin L\-SB\-0033\-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.

- Type: Service bulletin
- NHTSA id: 10179746
- Published by NHTSA: 2020\-09\-14
- Manufacturer's number: L\-SB\-0033\-20
- Manufacturer's date: 2020\-08\-31
- NHTSA component: EQUIPMENT; SERVICE BRAKES; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM

## NHTSA's summary

TSB: Some 2010 ? 2012 model year RX 450H vehicles may exhibit a condition where the brake, ABS, and/or TRAC warning light\(s\) are on and/or a Check VSC message displays. Diagnostic Trouble Codes \(DTCs\) C1391, C1252, C1256, or C1253 may be stored. This condition may be caused by a small internal brake fluid leak inside the brake booster assembly with master cylinder. Follow the Repair Procedure in this bulletin to address this condition.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179746-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179746-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Brakes, Electrical system, Equipment and accessories

## Trouble codes named

C1252, C1253, C1256, C1391

## Vehicles listed

- 2011 to 2012 LEXUS RX HYBRID
- 2010 LEXUS RX450H

JSON: [/v1/bulletins/10179746](/v1/bulletins/10179746)

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