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Service bulletin No. 1801.4

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10209901
Published by NHTSA2022-04-05
Manufacturer's numberNo. 1801.4
Manufacturer's date2022-03-30
NHTSA componentSERVICE BRAKES

NHTSA's summary

Advanced technical information for a brake squeal.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes

Vehicles listed
PORSCHE 7182017
PORSCHE 718 BOXSTER2016
PORSCHE 718 BOXSTER2017, 2018, 2019, 2020
PORSCHE 718 CAYMAN2016
PORSCHE 718 CAYMAN2017, 2018, 2019, 2020, 2021, 2022
PORSCHE 718 SPYDER2019
PORSCHE 718 SPYDER2020
PORSCHE 718 SPYDER2021
PORSCHE 718 SPYDER2022
PORSCHE 9111966 to 1967
PORSCHE 9111969 to 1970
PORSCHE 9111972 to 1979
PORSCHE 9111983, 1984
PORSCHE 9111987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
PORSCHE 9112012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
PORSCHE 911 (997)2005, 2006, 2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 42009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 42012, 2013 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4 CABRIOLET1995, 1996, 1997, 1998 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4 CABRIOLET2003 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4 GTS2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4S2003 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4S2009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA 4S2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA CABRIOLET1995, 1996, 1997, 1998 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA CABRIOLET2003 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA GTS2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA S2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 CARRERA S CABRIOLET2005, 2006 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT22003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT22019 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT2 RS2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT2 RS2018, 2019 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT32003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT32018, 2019 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT32021, 2022 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3 RS2008 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3 RS2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3 RS2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 GT3 RS2019 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 R2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 SPEEDSTER2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA2003 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 42009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 42012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 4S2009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TARGA 4S2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO1997 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO S2005 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911 TURBO S2010, 2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911E1972
PORSCHE 911S1974
PORSCHE 911SC1974 to 1975
PORSCHE 911SC2000 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 911T1972
PORSCHE 9121969
PORSCHE 912E1976
PORSCHE 914
PORSCHE 9141970 to 1976
PORSCHE 9182015
PORSCHE 918 SPYDER2015 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 918 SPYDER2016
PORSCHE 924
PORSCHE 9241977
PORSCHE 9241979 to 1980
PORSCHE 9241982
PORSCHE 9241987, 1988
PORSCHE 928
PORSCHE 9281978 to 1980
PORSCHE 9281981, 1982
PORSCHE 9281984
PORSCHE 9281985 to 1988
PORSCHE 9281989, 1990, 1991, 1992, 1993, 1994
PORSCHE 9281995
PORSCHE 9301978
PORSCHE 9441983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991
PORSCHE 9441992 to 1993
PORSCHE 944 TURBO1986, 1987, 1988 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 944S1987, 1988 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE 9681991
PORSCHE 9681992, 1993, 1994
PORSCHE 9681995
PORSCHE 9681997
PORSCHE 9682001
PORSCHE 987 CAYMAN2009
PORSCHE 996 TURBO2002
PORSCHE 997 (911)2008
PORSCHE BOXSTER1996
PORSCHE BOXSTER1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
PORSCHE BOXSTER2012, 2013, 2014, 2015
PORSCHE BOXSTER (987)2005, 2006, 2007, 2008, 2009, 2010, 2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE BOXSTER S2000, 2001, 2002, 2003 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE BOXSTER S2005 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE BOXSTER S2011, 2012, 2013, 2014 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE BOXSTER SPYDER2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CABRIO1990
PORSCHE CABRIOLET1999
PORSCHE CARRERA
PORSCHE CARRERA1974
PORSCHE CARRERA1987 to 1993
PORSCHE CARRERA1995 to 1999
PORSCHE CARRERA2001
PORSCHE CARRERA 21990
PORSCHE CARRERA 41989 to 1990
PORSCHE CARRERA GT2004 to 2005
PORSCHE CARRERRA GT2006
PORSCHE CAYENNE2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
PORSCHE CAYENNE (E2)2011 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE E-HYBRID2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GT2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GTS2006, 2007, 2008, 2009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE GTS2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S2003, 2004, 2005, 2006, 2007, 2008 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S E-HYBRID2015, 2016, 2017, 2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S E-HYBRID2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE S HYBRID2011, 2012, 2013 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO2003, 2004, 2005, 2006, 2007, 2008, 2009 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO2011, 2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO COUPE2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S2006, 2007, 2008 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S E-HYBRID2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYENNE TURBO S HYB COUPE2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYMAN2005
PORSCHE CAYMAN2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
PORSCHE CAYMAN2020
PORSCHE CAYMAN GT42020
PORSCHE CAYMAN R2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYMAN S2005
PORSCHE CAYMAN S2006 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE CAYMAN S2012 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE COUPE1990
PORSCHE GT22002
PORSCHE MACAN2014
PORSCHE MACAN2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
PORSCHE MACAN GTS2017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE MACAN S2015, 2016, 2017, 2018, 2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE MACAN TURBO2015, 2016, 2017, 2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022
PORSCHE PANAMERA 42011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 E-HYBRID2017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 EXECUTIVE2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 HYBRID2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 HYBRID EXECUTI2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 HYBRID SPORT T2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4 SPORT TURISMO2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4S2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4S E-HYBRID2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4S EXECUTIVE2017, 2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA 4S SPORT TURISMO2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA E-HYBRID2022 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA GTS2010, 2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA GTS2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA S2010, 2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA S E-HYBRID2011, 2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO EXECUTIVE2017, 2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S2012, 2013, 2014, 2015, 2016 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S E-HYBRID2017, 2018, 2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S HYBRID2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S HYBRID E2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO S HYBRID S2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PANAMERA TURBO SPORT TURI2018 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE PORSCHE
PORSCHE PORSCHE1989 to 1991
PORSCHE PORSCHE1993
PORSCHE TARGA1990
PORSCHE TARGA1996
PORSCHE TAYCAN2020, 2021, 2022
PORSCHE TAYCAN 4S2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
PORSCHE TAYCAN CROSS TURISMO2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
21V6970002021-09-08. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS; SERVICE BRAKES, HYDRAULIC:CRITICAL FASTENERS
19V7350002019-10-16. SERVICE BRAKES; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
20190782019-02-20. Brakes
19V1150002019-02-20. SERVICE BRAKES; ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
20161312016-03-23. Brakes
16V1690002016-03-23. SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES
19940051994-01-13. Brakes
93V2050001993-12-07. SERVICE BRAKES, HYDRAULIC:POWER ASSIST:VACUUM:HOSES, LINES/PIPING, AND FITTINGS
82V0490001982-05-12. SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
GR13D8002026-08-05. Service bulletin. Parts Withdrawal - 1 Set of Brake Pads for Disk Brake
GR13D7982026-08-05. Service bulletin. Parts Withdrawal - Brake Disc
No. 2210.32026-06-05. Service bulletin. Instructions on advanced technical information for 9YA – Electric Parking Brake Warning in the Instrument Cluster
No. D7522026-02-05. Service bulletin. Parts information for parts withdrawal involving the caliper without brake pads. The part numbers affected are in the attached PDF. The vehicles associated are cars that use the part numbers in the PDF.
No. 211-232026-01-06. Service bulletin. Symptom based workshop manual for a Brake Symptom - Yellow Warning Message “PSM Failure” in the Instrument Cluster: Checking Hydraulic Unit and Re-Program PSM Control Unit
No. 25302025-12-05. Service bulletin. Instructions on advanced technical information for Y1A, 971, 9YB, 9YA – Brake Noise & Long Brake Pedal
No. D7492025-12-05. Service bulletin. Parts information for parts withdrawal involving the brake disc 9Y0615301AJ
No. 31-252025-08-04. Service bulletin. Technical information for a complaint Maneuvering Assistant: Implausible Standstill When Reversing
D7192025-06-02. Service bulletin. Parts information for Parts Withdrawal - 1 Set of Brake Pads for Disk Brake. Vehicles included are all cars that use part number 992698451R
No. 214-212024-09-04. Service bulletin. Technical information on a complaint - brake rubbing/floating pedal pressure point/high wear on brake pads and discs/lateral runout of brake disc. replacing brake pads with race track pads