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Probably just a failing LED mirror indicator unit is my thoughts,may be poor connections in the mirror housing

iichel wrote: ↑Mon Jan 18, 2021 6:09 pm No this is about the blue wire to B+. B+ is the battery, not the blood type

Love that humour

I believe this is the type of kit RUM4MO is talking about

https://www.ebay.co.uk/itm/252305383894

This is just an example others are available

Hi your post is confusing :?: A Mk 4 would be 1994 - 99 you state it’s a 2007 polo thus making it a Mk 7 If this is correct then your 2007 polo does have PAS fluid , which can be accessed in the engine bay on the left side of the vehicle in front of the battery via a green screw cap to check the lev...

I believe the new instrument cluster will need coding to the car for immobiliser and key remotes to work

If it’s a second hand unit that may be another issue

The screw head rotates the barrel locking ring, seen in the OP picture in silver it’s like a C shape

Prone to falling out and landing in the bottom of the door if undone too far

Hi guys and girls Just a quick tech question,a friends 2002 1.2 12v polo has the brake pad warning light illuminated all the time the car is running, on the instrument cluster bang in the centre of the warning light square An orange broken circle thingy, discs and pads are recent and good , connecti...

I think possibly the timer relay has failed, so it’s too quick not allowing a full sweep of the screen. Although I can’t find a proper relay diagram online I’m sure there is a relay controlling it, it may be a separate item or integrated into the BCM , this you could call your local dealer about wor...

Does the wiper work ok if you wash the rear screen ? Ie does it do a full and continuous sweep while washing.

Rear wiper not part of an M.O.T

Yes very possibly the thermostat has failed in the open position

I totally agree with that , a new battery should have a good SOC but how long was it sitting on a shelf before it was sold?
Just a quick test could eliminate the battery as a issue

Battery voltage is different to SOC, you can have 12.5 volts but also have only 25% SOC get the battery properly tested
Yes you will need a tool of some kind to check what the s/s voltage threshold is set at

Is the centre nut tight or the arm broken ?

Can I assume this car was bought second hand ? Maybe the previous owner didn’t like the stop/start feature and coded it out , this would give the same message as you have with no other warning lights on.I would have thought changing a battery for one with a good state of charge ie 80% + would normal...