# Service bulletin 122\-L5E2R\-04

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: 10134862
- Published by NHTSA: 2018\-04\-23
- Manufacturer's number: 122\-L5E2R\-04
- Manufacturer's date: 2018\-03\-01
- NHTSA component: SERVICE BRAKES, HYDRAULIC

## NHTSA's summary

Subject: Replacing brake booster during repairs Information: If the brake booster on the 911 Carrera 2/Targa/Speedster \(964\) needs to be replaced, the replacment brake booster will be a 911 \(993\) version. During conversion, the brake master cylinder, mounting saddle and \(push rod\) joint screw must be replaced \(? Figure 1\). The power steering pressure and return linesmay also have to be replaced.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10134862-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10134862-0001.pdf)

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

## Components

Brakes

## Vehicles listed

- 1990 to 1994 PORSCHE 911

## Recalls for the same vehicles and component

- [1994005](/recalls/tc/1994005.md), 1994-01-13: Brakes
- [93V205000](/recalls/nhtsa/93V205000.md), 1993-12-07: SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM:HOSES, LINES/PIPING, AND FITTINGS

## Other bulletins for the same vehicles and component

- [No. 1801.4](/bulletins/10209901.md), 2022-04-05, Service bulletin: SERVICE BRAKES. Advanced technical information for a brake squeal.
- [ATIALL41605](/bulletins/10198525.md), 2021-06-28, Service bulletin: EQUIPMENT; SERVICE BRAKES. Understanding and addressing brake squeal complaints.
- [122\-S6Q2R\-06](/bulletins/10188291.md), 2021-03-06, Service bulletin: EQUIPMENT; SERVICE BRAKES. Resubmitting at request of Mr. Bernard Hardgrave. Advanced technical information on brake fluid for all Porsche vehicles.
- [GRP4/9310](/bulletins/39626.md), 1995-11-01, Service bulletin: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS. BRAKE VIBRATION DAMPER APPLICATION \- NEW DAMPING PLATE WITH STEEL CLIP. \*TW

JSON: [/v1/bulletins/10134862](/v1/bulletins/10134862)

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