Series 3 Genuine Temperature Sender Resistance.

Ric82 said:

Good Morning all

I thought I would post this as it might help someone. I recently gave my Series 3 cooling system an overhaul, replaced the faulty Temp sensor with a replacement and exchanged all the heater pipes and also realised the previous owner had removed the thermostat.

After reconnecting everything back up how it should be I noticed that the temp gauge was reading in the red after about 10 minutes so I manually checked the engine temp with an infrared temp gauge and everything felt normal I left it running a bit longer and went for a drive and the temp gauge stayed in the red but consistent.

I then decided to replace the temp sender with a genuine one and everything now works as expected so I thought I would share the resistance reading of the genuine sensor.

At cold and standing for a week the genuine sensor reads 880ohms
At running, temperature engine block and pipes 74c the sender reads 71ohms and the gauge sits in the normal range on the dash.

I hope this helps someone else.

Many Thanks
Richard

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Dai A'Bollical said:

Hi Richard, I've had this problem for 25 years, so thanks for your helpful post. Just one question. Which is the 'genuine' one and where can I get it. Best wishes, Dai

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Ric82 said:

Good Morning all

I thought I would post this as it might help someone. I recently gave my Series 3 cooling system an overhaul, replaced the faulty Temp sensor with a replacement and exchanged all the heater pipes and also realised the previous owner had removed the thermostat.

After reconnecting everything back up how it should be I noticed that the temp gauge was reading in the red after about 10 minutes so I manually checked the engine temp with an infrared temp gauge and everything felt normal I left it running a bit longer and went for a drive and the temp gauge stayed in the red but consistent.

I then decided to replace the temp sender with a genuine one and everything now works as expected so I thought I would share the resistance reading of the genuine sensor.

At cold and standing for a week the genuine sensor reads 880ohms
At running, temperature engine block and pipes 74c the sender reads 71ohms and the gauge sits in the normal range on the dash.

I hope this helps someone else.

Many Thanks
Richard

Click to expand...

Ramp7 said:

My gauge reads hot all the time as well. I checked the Ohms and its 603 when cold. I wonder what's up. This is a North America model Series III.

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