Access to the M20 Blue Temp sensor for replacement

[Sharknose3]

Hello,

I've been noticing that my 320 Tourer doesn't like starting when warm but always starts first turn when cold so I decided to replace the blue 2 pin temp sensor that is used by the ECU.
I've had a look and the access looks a bit restricted. Access for a socket is restricted by a plastic rail and the sensor is too recessed to reach with a spanner, without risking rounding the corners of the sensor.

Any ideas from someone who has done this on how best to do it fastest.

Also, do I just need to open the reservoir filler cap to depressurise or should I drain some coolant before removing the old sensor?

Thanks for any advice you can give,

Sharknose

[RICHIE74]

Morning Sharknose 3
Easiest way to change your cold start sensor is to also remove your coolant temp guage sensor ( brown sensor right next to it ) . You'll get onto it with an open ended spanner easy enough . They are not tight so you shouldnt round it . I would open the coolant bottle to depressurise the system .

[Brianmoooore]

Morning Sharknose 3
Easiest way to change your cold start sensor is to also remove your coolant temp guage sensor ( brown sensor right next to it ) . You'll get onto it with an open ended spanner easy enough . They are not tight so you shouldnt round it . I would open the coolant bottle to depressurise the system .

Then put it straighr back on to minimize coolant leakage. If no air goes in, then very little coolant will leak out.

[Sharknose3]

Thanks a lt for the useful advice,

It turned out to be a 10 minute job,

Sharknose