Hey guys, I'm pretty new to the forum, I got an Octavia mk2 1.9 77kw and there seems to be an issue with the loss of power. I came to a conclusion that it's the mass air sensor because after disconnecting it and driving around nothing changed, drove same as plugged in.
(futher about the loss of power: car seems weak usually and once I reach 120 km/h it just seems to go limp, like the gas pedal was barely working)
But the issue is with buying a new one, I took it out, went to a parts store and they couldn't find a match by the part code, or one that looked like mine. I'm leaving some pictures below, of the one that I have and wanted to know how to tell which would be okay to buy as I won't be able to return it.
 
^ Sensor in my car^

And this is one of the types I found around part stores, would this "fit" as it looks different and might have/not have the exact same specifications?


And another thing I wanted to ask what's this part? Some sort of gate in the bottom of the airbox, couldnt find it online and it seemed to not be working properly as it just flops around. And where does that air go as the hose that it leads to is full of dust and anything else that goes below the filter (which is probably not great)

Someone please help as I need to buy the part to have my car ready for a trip 

I would trying taking off the plastic pipe which the MAF goes into as there should be part number there as some of the Bosch replacement ones come pre-installed, so you replace the complete pipe rather than just the insert.

The Bosch part number of the MAF is F00C262055. Written just below the word Bosch. Copy/paste that into ebay or ask your preferred local motor factors to get one for you. All the 0's are noughts not letter 'oh'.

Dunno about airbox thing but almost certainly safe to ignore for now.

On 12/06/2021 at 00:03, Wino said:

The Bosch part number of the MAF is F00C262055. Written just below the word Bosch. Copy/paste that into ebay or ask your preferred local motor factors to get one for you. All the 0's are noughts not letter 'oh'.

Dunno about airbox thing but almost certainly safe to ignore for now.

I've grabbed a MAF sensor from a Sharan which were almost identical yet nothing really changed. Could it be possible that another culprit is the solenoid vacuum block? As it makes sort of a buzzing noise sometimes and just thought lack of power, hard brakes after the car sits for sometime, could point to a vacuum issue.

Currently also waiting to get a diagnostic as I got an Emissions workshop error + check engine light

I meant this solenoid thingy

Re hard brakes may indicate loss of main vacuum or from accumulator (check pipe to black sphere).

 

Check the vacuum from the tandem pump, they are known to get a loose nipple and splits in the rigid plastic hose, all repairable-new parts or silicone seal around nipple and a sleeve joint from suitable hose after cutting out split section.