XK8 / XKR ( X100 ) 1996 - 2006

Need help identifying part (sensor ?)

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Old Feb 28, 2026 | 12:33 PM
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RAD MAX's Avatar
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Question Need help identifying part (sensor ?)

Well I bought yet another xk8 (if you can afford to buy a jag buy more - you'll need them for parts)

year 2000 convertible.
Vehicle intermittently shows "Performance Restricted"
I found this little piece up by the firewall on the drivers side near the power steering cover, under the coolant reservoir

It was dangling from some tape and not attached to anything
Googles (not so intelligent) AI keeps telling me its a map / barometric/atmospheric sensor but I can only find those with 4 pins
This has 2 pins

Attaching photos:

It has 2 wires on one end , 2 pins on the other end
and the number printed n the part reads
613
300
15QF

please can anyone identify what this is ?

(and if so ... is the same part in a 1998 XK8? is it compatible and where do I locate it?... I live hours from any city to buy one , if I can cannibalize off my other jag I will )

Thanks in advance







 
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Old Feb 28, 2026 | 12:54 PM
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Don't know but that sure looks to be added by some previous owner. I would remove it. Anything else left?

Dump garbage AI and get the shop manual for your car. Get a scanner than can read the codes the car has. When you get restricted performance there is a reason so chase those codes down first and post back what the car shows.
Have you done any other repairs?
.
.
.

 
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Old Feb 28, 2026 | 01:15 PM
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Coolant level sensor!
 
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Old Feb 28, 2026 | 01:59 PM
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RAD MAX's Avatar
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Originally Posted by motorcarman
Coolant level sensor!
DING DING DING

We have a winner
typed coolant level sensor into Oreillys and it came back with an exact picture and says that part firs my jag

Beautiful! Thankyou
 
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Old Feb 28, 2026 | 02:04 PM
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RAD MAX's Avatar
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Motorcarman has correctly identified it as the coolant level sensor

but actually the Dash warning is coming from an intake leak because the manifold isnt sealing correctly (my husband found that when his cigarette smoke got sucked into the manifold hahaha)

.. I'm in the middle of swapping that off the other jag now
 
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Old Mar 1, 2026 | 03:47 AM
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FYI, the XK8/XKR has it's own section, this one is for the XJ8/XJR x308.

Just as in future you'd be better off in the right section as they'll know the cars better.
 
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Old Mar 2, 2026 | 08:07 PM
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Still, reach under the reservoir bottle and see if your sensor is plugged in: sensor is a forcefit into the socket.

once you fix the intake leak, you should see a low coolant message unless the prev owner has wired around the sensor
 

Last edited by Jhartz; Mar 2, 2026 at 08:11 PM.
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Old Mar 2, 2026 | 08:30 PM
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Hi RAD MAX,

I have moved your thread from the forum for the X308 saloons to the forum for the X100, which is the Jaguar factory project code for your 2000 XK8.

Cheers,

Don
 
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