S-Type / S type R Supercharged V8 ( X200 ) 1999 - 2008 2001 - 2009
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Old Mar 21, 2025 | 11:55 AM
  #1  
GoKittyGo's Avatar
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From: Newport News, VA
Default Thermostat

My thermostat is sticking open and throwing code (not overheating!) I’ve watched several YouTube videos and feel pretty confident that I could do it myself- mechanic wants $1500 🥴

Is it really as simple as the videos?



2005 S-Type 4.2
 
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Old Mar 21, 2025 | 12:13 PM
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From: Newport Beach, California
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If you have mechanical ability and the necessary tools, yes, it's fairly easy to do. I would recommend replacing the entire water outlet, which contains the thermostat. The JLR part number is AJ811793.

Make sure to use the correct coolant after you replace the thermostat.
 
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Old Mar 21, 2025 | 02:07 PM
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Please explain the “entire water outlet”. Also, your part isn’t listed as compatible to the 2005 Stype.
 

Last edited by GoKittyGo; Mar 21, 2025 at 02:13 PM. Reason: Finished thought.
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Old Mar 21, 2025 | 03:29 PM
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https://www.sngbarratt.com/English/#...assembly/31315

Confirm fitment against your VIN.
 
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