Breezy_Pete

More likely oil cooler than head gasket if the sludge looks like oil contamination.

Profile says 1.2 47kW 2007, so BME engine code. Scan with VCDS or a handheld scan tool. Post fault codes here. Fault lights mean there is fault information stored in the engine ECU; retrieve it please. Check spark plugs. Check brake servo vacuum pipe.

Where was the level on the dipstick before and after this top-up? It sounds as though you may never have looked at the dipstick?

Disconnect the pipe near the pump and jam a golf tee up it?

Sump sensor is for oil level and temperature.

What size are the present tyres on the car? They may also fit a 7J rim acceptably. @Carlston is the man.

No, they have oil pressure switches. Simple things that just short a wire to earth at a given pressure. Not able to give a pressure reading.

I think it may well be. Either that or ours is wrong. 😆

This makes more sense to me, more wraparound on little alt pulley Both 1.2 12 valve. BME superseded AZQ at end of 2004.

Hmm... I just took a pic of our AZQ one and it isn't like that.

Not bad to do. 16mm(?) spanner on tensioner, but has to swing through a biggish angle to give enough slack, so may be better going downward where there's more space away from engine mount. Remove belt from a non-lipped pulley first and back onto same one last with new belt, after fitting over all the lipped ones. Headtorch will be handy if no other lighting, photos of belt run before removal may prevent headscratching on refitting.

Just noticed that the green one is listed as 2-pin, that's unusual. Does it fit into plastic?

The ones that aren't greyed out should be on your engine. 038919081H seems like the correct brown one. £15.33 inc VAT at dealer. I guess the green one is the one that's physically located away from brown and blue.

Yep, message me if you don't wish to post it. 👍

Wouldn't want to say which is correct without VIN filtering.

Serviced including cabin filter? Wouldn't be wise to assume.

Any recent history of pollen/cabin filter change? Reduced airflow would reduce the cooling of the resistor, so worth a look if no recent action on that.

Would be easier to pick right one(s) with VIN. Is the 0.3-0.6 one green?

Hopefully this is the problem. I can look up current part number and price for genuine with the VIN, if useful.

Do you have receipts from previous visits detailing which part or parts were replaced?

On a 2008 car?

Fuse 11 on this car; but electric windows wouldn't work right if that was blown. With engine running, if you switch them on at the control, do you hear a click from under the dash, near your right knee?

Probably historical, but @ColinD is the man who'll know.

Ernie is almost certainly going to make me a millionaire on Wednesday, Amanda. Will send a few tanksworth your way.

Not bad to do on a mk2, I think.