Propane Regulator May Fail and Cause Fire – 2018-2019 KZ RV Sidewinder

June 4, 2021 NHTSA CAMPAIGN NUMBER: 21V426000

Propane Regulator May Fail and Cause Fire

Increased propane pressure can enlarge the flames in gas appliances, increasing the risk of a fire.


NHTSA Campaign Number: 21V426

Manufacturer KZRV, L.P.

Components EQUIPMENT

Potential Number of Units Affected 100



KZRV, L.P. (KZRV) is recalling certain 2018-2019 KZ RV Sidewinder vehicles equipped with a Winntec model 6020 two-stage propane regulator. The regulator may fail, causing an increase in propane pressure.



Dealers will replace the regulator and test the propane system for leaks, free of charge. Owner notification letters were mailed August 3, 2021. Owners may contact KZRV customer service at 1-800-768-4016 ext. 154 or 153.



Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to


Recreational Vehicle Safety Recall Notice

Safety Recall: 21V‐426

Safety Advisory: KZ‐2021‐03

June 21, 2021



This notice applies to your vehicle:  «VIN»

«City», «State»  «Zip»
Dear «Owner_name»:

This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. KZRV has decided that a defect which relates to motor vehicle safety exists in certain 2018 and 2019 Sidewinder models. As a result, KZRV is conducting a safety recall.  We apologize for any inconvenience this action may cause you; however, your safety and continued satisfaction are of the utmost importance to us.

Reason for this recall

The vehicles subject to this recall were built with a model 6020 propane regulator manufactured by Winntec that may have a faulty secondary rubber seal.  This malfunction may result in propane pressures that exceed the propane appliances design limits and/or may be venting propane to the atmosphere which could result in a fire that results in property damage, personal injury or death.


What we will do

The remedy is to replace the regulator and pigtails. The repair should take approximately 30 minutes to complete.  This repair will be done at no cost to you.


What we need you to do

You should contact your selling dealer immediately to schedule a service appointment to have the defect repaired in your vehicle.  If you have questions concerning this recall or if you need any assistance, please contact the KZRV Warranty/Service Department by mail at KZRV, L.P., 0985 N 900 W, Shipshewana, IN 46565, or by phone at (800)768-4016 ext. 154 or 153.

If you had appropriate repairs completed prior to receipt of this recall notice, and if you incurred any direct cost in connection with obtaining such repair, you may be eligible to receive reimbursement from KZRV by contacting the KZRV Warranty/Service Department.


If after contacting KZRV Customer Service you are still not satisfied we have done our best to remedy this situation, you may also submit a written complaint to: Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, SE, Washington, DC 20590. You may call the toll‐free Vehicle Safety Hotline at 1‐888‐327‐4236 (TTY:  1‐800‐424‐9153; or go to Federal regulations require that any vehicle lessor receiving this recall notice must forward a copy of this notice to the lessee within ten days.


We apologize for any inconvenience this action may cause you; however, your safety and continued satisfaction are of the utmost importance to us.


Thank you for your attention and cooperation in this matter.




Delbert Miller
Vice President Corporate
cc:  National Highway Traffic Safety Administration (NHTSA)


11/4/20–Grand Design RV informs THOR Ind. of three incidents involving Winntec Model 6020 regulators, where the regulators were suspected as the cause of fires. The Thor companies reviewed the issue internally and found no issues with these regulators at that time.


12/4/20–KZ RV informs THOR Ind. of two issues under investigation with the same suspect regulators.


12/22/20–Grand Design performs lab analysis on two failed regulators and finds they contain an oily substance inside. There is a belief that the oily substance is machining oil from a manufacturing process.


2/24/21–Grand Design informs THOR Ind. they are investigating several more fires, and will be sending regulators from those incidents for lab inspection.


3/16/21–Lab analysis performed on six regulators from Grand Design, including one exemplar and one from KZ RV. In the lab setting, the KZ RV regulator operated within allowable parameters, although it contained the same oily residue seen on the field samples.


4/19/21–THOR Ind. engages Exponent Engineering to conduct analysis of regulators to determine source of oily substance.


5/10/21–Safety Committee Meetings conducted at KZ RV, Keystone RV and Jayco RV, to update them on regulator investigation. All committees request further investigation of specific claims and confirmation of Exponent findings.


5/12/21–Exponent provides written report/presentation on regulator analysis.


5/14/21–Meeting held with Grand Design, Dehco, Winnspec International, and Chen Fong to discuss regulator issue. Winnspec given until May 18, to return information regarding issues with their regulators.


5/19/21–Safety Committee Meetings conducted at KZ RV, Keystone RV and Jayco RV to update them on the regulator investigation.


5/21/21–THOR Ind. Discussed regulator issue with the Medium Heavy Duty ODI office.


5/24/21 & 5/25/21 – Meeting with Grand Design, Dehco, Winnspec International, and Chen Fong at Livonia, MI testing facility, to discuss regulator investigation. Chen Fong agrees the regulator is allowing higher pressure than expected with a compromised second stage seal.


5/27/21–Safety Committee Meetings conducted at KZ RV, Keystone RV and Jayco RV.  All safety committees decide to move forward with a recall for safety for units built with a defective Winntec Model 6020 regulator.


21E081 – Possible LP Regulator Failure – Winntec & WIC Model 6020 LP Regulators


21E081 – Possible LP Regulator Failure – Winntec & WIC Model 6020 LP Regulators



2 Affected Products




9 Associated Documents

ISSUED Owner Notification Letter(Part 577)

RCONL-21V426-5635.pdf 231.9KB



Recall 573 Report – Amendment 3

RCLRPT-21V426-2208.PDF 213.926KB



Defect Notice 573 Report

RCLRPT-21V426-1112.PDF 213.671KB



Miscellaneous Document – Chronology

RMISC-21V426-2469.pdf 52.058KB



Recall 573 Report – Amendment 1

RCLRPT-21V426-6387.PDF 213.693KB



Recall Acknowledgement

RCAK-21V426-4980.pdf 645.547KB



Recall 573 Report – Amendment 2

RCLRPT-21V426-8191.PDF 213.693KB



Recall Quarterly Report #1, 2021-3

RCLQRT-21V426-9963.PDF 211.123KB



Recall Quarterly Report #2, 2021-4

RCLQRT-21V426-2460.PDF 211.218KB



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Last update on 2022-10-03 / Affiliate links / Images from Amazon Product Advertising API

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