# Service bulletin CAY1148\-15

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: 10198536
- Published by NHTSA: 2021\-06\-28
- Manufacturer's number: CAY1148\-15
- Manufacturer's date: 2016\-02\-19
- NHTSA component: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:ENGINE COOLANT HOSES AND FITTINGS; ENGINE AND ENGINE COOLING

## NHTSA's summary

WF89\-Replacing Coolant Regulator

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2016/MC-10198536-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2016/MC-10198536-9999.pdf)

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

## Components

Engine, Glass, wipers and mirrors, Heating and air conditioning

## Vehicles listed

- 2011 PORSCHE CAYENNE S HYBRID

## Recalls for the same vehicles and component

- [2017296](/recalls/tc/2017296.md), 2017-06-07: Engine
- [17V368000](/recalls/nhtsa/17V368000.md), 2017-06-07: ENGINE
- [15V016000](/recalls/nhtsa/15V016000.md), 2015-01-20: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

## Other bulletins for the same vehicles and component

- [No. 28\-26](/bulletins/11037816.md), 2026-10-02, Service bulletin: POWER TRAIN; ENGINE. Manufacturer's Certificate for Overview of Approved Porsche C40 Engine Oils. Note that this bulletin covers all models back to model year 1984, for which C40 engine oils are allocated.
- [No. 27\-26](/bulletins/11037813.md), 2026-10-02, Service bulletin: POWER TRAIN; ENGINE. Manufacturer's Certificate for Overview of Approved Porsche C20 Engine Oils. Note that the bulletin covers all models back to model year 1984, for which C20 engine oils are allocated.
- [No. 26\-26](/bulletins/11037812.md), 2026-10-02, Service bulletin: ENGINE; POWER TRAIN. Manufacturer's Certificate for Overview of Approved Porsche C30 Engine Oils. Note that the bulletin includes all models back to model year 1984, for which C30 engine oils are allocated.
- [No. 25\-26](/bulletins/11037808.md), 2026-10-02, Service bulletin: POWER TRAIN; ENGINE. Manufacturer's Certificate for Overview of Approved Porsche A40 Engine Oils. Note that this bulletin covers all vehicles from model year 1997 to 2020, for which A40 engine oils are assigned. Model years 1997\-2001 are not available for selection in the system.
- [13/26](/bulletins/11035916.md), 2026-08-06, Service bulletin: ENGINE. Allocation of Approved Engine Oils MY 2027 \(13/26\)
- [GR13D790](/bulletins/11034838.md), 2026-07-08, Other: ELECTRICAL SYSTEM; ENGINE. Parts Withdrawal \- Various Parts
- [20/26](/bulletins/11034777.md), 2026-07-07, Other: ENGINE. Overview of Approved Porsche C20 Engine Oils \(20/26\)
- [19/26 1701](/bulletins/11034776.md), 2026-07-07, Other: ENGINE. Overview of Approved Porsche C30 Engine Oils \(19/26\)
- [21/26 1701](/bulletins/11034775.md), 2026-07-07, Other: ENGINE. Overview of Approved Porsche C40 Engine Oils \(21/26\)
- [15/26 1701](/bulletins/11034774.md), 2026-07-07, Other: ENGINE. Overview of Approved Porsche A40 Engine Oils \(15/26\)

JSON: [/v1/bulletins/10198536](/v1/bulletins/10198536)

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