ApertureS

Aircare is a software thing, nothing to do with sensors. Its something to do with blowing the air high and sucking it back in through recirc basically. Air quality sensors are fitted on any car with climatronics (2 or 3 zone)

What do you mean turned on? All air will always go through the pollen filter whether it’s on recirc or not.

So i'm sure each and every Superb MK3 and any other MQB platform car including Golf's, Passats and such have came across the following fault 1 Fault Found: 263425 - Air Quality Sensor B10AF 04 [009] - Internal System Fault Confirmed - Tested Since Memory Clear And the only solution is to replace the Air quality sensor, located in the plenum chamber. The part numbers for the superb went in the following order 5Q0907643B was the original up to 2016. Since then the part number has been revised with the letter at the end changing, going to C,D,F and then finally as of 2023, the newest part number is 5Q0907643E. The part has its own self diagnosis and is non servicable so its simply a case of removing, replacing and clearing the fault codes, but no one actually knows what the common issue is. Now onto the part itself - 5Q0907643D dated 05-06-2017: The air quality sensor also called AQS is fitted in the cabin air intake and detects pollution in the incoming air including emissions and pollen - It then feeds this back to the climatronic control module via the LINbus and in turn this automatically switches the air to recirculation. That is as simple as the process can be. The outside of the part consists of a completely sealed plastic casing, 3 pins (12V, ground, LINbus) and an air intake with a white membrane over it. The part needed to be cut open to access the internal circuit board which was done with a very small hacksaw. Inside we had a small double sided circuit board as pictured below The components on this circuit board are as follows - as well as what I could possibly test, has been tested. Various resistors - couldnt find a single one burnt out, okay Various capacitors - couldnt find a single one burnt out, okay 16F1938 micro controller - Unable to test but this is the main control unit for this component and if it was faulty, there is a good chance we wouldnt get the above fault code - instead no comms A voltage regulator - same diagnosis as above LINbus controller - same diagnosis as above, would not have any comms if faulty And then the 2 very odd things on the ends of the 'fingers' almost..... see below So on closer inspection you have these 2 very small black boxes, each with 4 connections I have no idea what these components are, but they seem to be some kind of optical sensor, but on an extremely tiny scale. I assume these are what pick up the particulates and tell the control unit there is a high pollution level - but this is just speculation. Now I done my best to get an up close picture of the sensors and their connections, but on my phone camera this was almost impossible, but this is the best I can do. Youll notice each of these components is isolated from the ground plane (light green part of the circuit board) and on each of the black boxes there are 4 very small gold dots on top. I have nothing to measure these with but a guess would be 0.1mm each. These are the connection points from the component to the circuit board. You will also notice that to connect the circuit board to the component is an absolutely TINY gold wire (can be seen on closest component bottom right connection). These are so much smaller than a human hair even, impossible to measure with any tools I have. Most of these tiny gold wires are snapped off at one or both ends! So for the top component - the top 2 wires are completely missing, the bottom 2 are still connected. The bottom component - the top 2 wires, one is detatched from the circuit board, the other is missing. The bottom left is not touching the circuit board, the right is connected only to the circuit board. So basically, these wires that are maybe a 10th of a human hair. Of the 8 connections, 2 are doing their job. And here lies the issue! These components and their connections are so fragile, being in an engine bay is enough to completely destroy them. Would be very interesting to see a newer revision and what has changed internally.

Im pretty sure they are a completely sealed unit so the battery cannot simply be changed. The unit will need replacing as one. Depending on the variant it may be bolted to the plenum intake or to the lower windscreen and need drilling out.

The mechanism and cables come as one assembly Up to 07.07.2019 built date is 3V0823529F From 08.07.2019 built date it is 3V0823529H Lever is 3V0823661C

So a further update, the alarm has been going off intermittently without any cause. Checking the data on the car shows 'lost comms with module' but doesnt tell me which module. Thats great! Thought id test the battery and it had a capacity of 350Ah of 680Ah. This is after driving the car for 2 hours each day all week. Its a shame but seems like after 8 years the original battery is finally due for replacement. On top of that, when you have the parking heater system the vehicle is meant to have an AGM, not EFB battery. So the largest possible battery to fit is a 096 size, AGM type battery. I use Yuasa batteries for work all the time so a YBX9096 is the optimal battery and next was finding somewhere with one. Halfords sell the battery for £237.19 which is wildly overpriced. But they do offer price match to high street and online retailers. So after some hunting I found it for £128.50 online and went into Halfords, After no fuss at all, walked out with my battery and very proud of my receipt. Battery fitted to vehicle, and coded correctly to the new fleece type with higher capacity. Now to monitor the alarm faults.

Good choice actually. fitted these to my mums car and the brake dust is very minimal. compared to the oe pads which have to be cleaned off every week (granted the grooved discs don’t help this)

No corrosion anywhere, in fact they only recently came back from the powder coaters and had the new pads fitted. There is vertical movement in the holder of about 1.5mm which is enough to cause an awful knock. Not ideal 😞 Wouldnt ever go near EBC pads again, had a set in my old polo and lost brakes when the friction material fell out as it unglued itself from the backing plate. I am quite the fan of TRW, Ferrodo and pagid, never had issues with these

If you mean the factory reset in the infotainment system, then no. the reset is just to remove all personal data from the vehicle and all user settings, it will not clear any fault codes or car faults. Unless you mean something else by reset the adblue system?

The newer blade is roughly £18 I also checked this, sadly no other car has this blade on it. the 3V dictates a Skoda superb, the 9 dictates the body type as estate (some part numbers are still used on different cars, but not in this case)

May be too late now but if you send me your vin, i can check the skoda parts catalogue for you.

If you can be more specific about your vehicle, VIN is best, I can get the specific one for your car. As from 2017-2018 there are 4 different fuse layouts depending on month.

Engine bay large fuses № name of the main electrical equipment nominal value purpose/detail terminal 1 - fuse 1 on fuse holder A -SA1- 125A - power supply terminal 30 30a 2 - fuse 2 on fuse holder A -SA2- 400A - generator with voltage regulator -CX1- 30a 3 - fuse 3 on fuse holder A -SA3- 80A - Power steering control unit -J500- 30a 4 - fuse 4 on fuse holder A -SA4- 80A - power supply terminal 30 30a 5 - fuse 5 on fuse holder A -SA5- 50A - Radiator fan control unit -J293- 30a Engine bay regular fuses, since July 2018 № name of the main electrical equipment nominal value purpose/detail terminal F1 - fuse 1 on fuse holder B -SB1- 25A - ABS control unit -J104- 30a F2 - fuse 2 on fuse holder B -SB2- 40A - ABS control unit -J104- (for vehicles without pedestrian protection system) 30a 60A - ABS control unit -J104- (for vehicles with pedestrian protection system) F3 - fuse 3 on fuse holder B -SB3- 15A - Engine control unit -J623- (for petrol engines) 87a 30A - Engine control unit -J623- (for diesel engines) F4 - fuse 4 on fuse holder B -SB4- 5A - Engine electronics, low heating output relay -J359- , high heating output relay -J360- , automatic glow plug timing control unit -J179- (for diesel engines), radiator fan control unit -J293- 87a 10A - Engine electronics (for petrol engines), radiator fan control unit -J293- F5 - fuse 5 on fuse holder B -SB5- 10A - Power supply relay for engine components -J757- , engine electronics 87a 7.5A - engine electronics (for engine letter code DHFA) - not occupied (for engine code CHZD, DKRF, CZDA, DADA) F6 - fuse 6 on fuse holder B -SB6- 7.5A - Brake pedal switch -F47- 87a F7 - fuse 7 on fuse holder B -SB7- 7.5A - Coolant shut-off valve -N82- , gearbox coolant valve -N488- , transmission oil cooling pump -V478- (for engine code CJSA, DLBA, DKTB, DKZA) 87a 10A - engine electronics (for engine code CHZD, DKRF, CZDA, DADA, DHFA, DGTE, CRVC, DFFA, DJGA) F8 - fuse 8 on fuse holder B -SB8- 10A - Lambda probe -G39-, lambda probe after catalytic converter -G130-, NOx sensor control unit -J583-, NOx sensor 2 control unit -J881- (for engine codes CHZD, DKRF, CZDA, CWVA, DADA, DHFA, DGTE, DFFA, DJGA) 87a 15A - Lambda probe -G39-, lambda probe after catalytic converter -G130- (for engine code CJSA, DLBA, DKTB, DKZA) F9 - fuse 9 on fuse holder B -SB9- 10A - engine electronics (for engine code CJSA, DLBA, DKTB, DKZA) 87a 20A - ignition (for engine code CHZD, DKRF, CWVA, DADA, DHFA, CZDA) F10 - fuse 10 on fuse holder B -SB10- 15A - Fuel pump control unit -J538- , fuel pump relay -J17- (for petrol engines without all-wheel drive) 87a 20A - Fuel pump control unit -J538- (for diesel engines and for the pressure pump code DKZA with all-wheel drive) F11 - fuse 11 on fuse holder B -SB11- 40A - heating element of additional air heater -Z35- 87a F12 - fuse 12 on fuse holder B -SB12- 40A - heating element of additional air heater -Z35- 87a F13 - fuse 13 on fuse holder B -SB13- 30A - Windscreen heating relay -J47- 30a F14 - fuse 14 on fuse holder B -SB14- 30A - Relay 2 heated windshield -J611- 30a F15 - fuse 15 on fuse holder B -SB15- 15A - Horn relay -J413- , high-tone horn -H2- , low-tone horn -H7- 30a F16 - fuse 16 on fuse holder B -SB16- 15A - fuel pump relay -J17- 30a 20A - Power supply relay for engine components -J757- 10A - Gas shut-off valve relay -J908- F17 - fuse 17 on fuse holder B -SB17- 7.5A - Main relay -J271- , Engine control unit -J623- , ABS control unit -J104- , Heated windscreen relay -J47- 30a F18 - fuse 18 on fuse holder B -SB18- 5A - Diagnosis of the data bus interface -J533- (for vehicles without independent heating / without start-stop system) 30a - Battery control and monitoring unit -J367- (for vehicles with independent heating / with start-stop system) F19 - fuse 19 on fuse holder B -SB19- 30A - Windscreen wiper motor control unit -J400- 30a F20 - fuse 20 on fuse holder B -SB20- 7.5A - Anti-theft device sound signal -H8- 30a F21 - fuse 21 on fuse holder B -SB21- 15A - mechatronics of the dual clutch transmission -J743- (for vehicles with dual clutch transmission 0GC, 0D9) 30a 30A - mechatronics of the dual clutch transmission -J743- (for vehicles with dual clutch transmission 0CW), automatic transmission control unit -J217- (for vehicles with 6-speed automatic transmission 09G) F22 - fuse 22 on fuse holder B -SB22- 5A - Engine control unit -J623- 50 F23 - fuse 23 on fuse holder B -SB23- 30A - starter -B- 50 F24 - fuse 24 on fuse holder B -SB24- 40A - heating element of additional air heater -Z35- 87a F25 - fuse 25 on fuse holder B -SB25- - F26 - fuse 26 on fuse holder B -SB26- - F27 - fuse 27 on fuse holder B -SB27- - F28 - fuse 28 on fuse holder B -SB28- - F29 - fuse 29 on fuse holder B -SB29- - F30 - fuse 30 on fuse holder B -SB30- - F31 - fuse 31 on fuse holder B -SB31- 15A - Brake drive vacuum pump -V192- (for engine code CHZD, DKRF) 87a 20A - Brake drive vacuum pump -V192- (for engine code DADA, DHFA) F32 - fuse 32 on fuse holder B -SB32- - F33 - fuse 33 on fuse holder B -SB33- 30A - Additional hydraulic pump 1 transmission oil -V475- 30a F34 - fuse 34 on fuse holder B -SB34- 15A - Cross lock control unit -J647- 30a F35 - fuse 35 on fuse holder B -SB35- - F36 - fuse 36 on fuse holder B -SB36- - F37 - fuse 37 on fuse holder B -SB37- 20A - Additional heater control unit -J364- 30a F38 - fuse 38 on fuse holder B -SB38- - Interior fuses, since July 2018 № name of the main electrical equipment nominal value purpose/detail terminal F1 - fuse 1 on fuse holder C -SC1- - F2 - fuse 2 on fuse holder C -SC2- - F3 - fuse 3 on fuse holder C -SC3- - F4 - fuse 4 on fuse holder C -SC4- 10A - heated steering wheel -Z36- 30a F5 - fuse 5 on fuse holder C -SC5- 7.5A - diagnostics of the data bus interface -J533- 30a F6 - fuse 6 on fuse holder C -SC6- 5A - Vehicle interior monitoring device sensor -G273- , vehicle tilt sensor -G384- 30a F7 - fuse 7 on fuse holder C -SC7- 10A - Rear window heating relay -J9- , Heater control unit -J65- , Air conditioning control unit -J301- , Climate control system control unit -J255- , Preselector sensor control unit -J587- , Independent heater radio receiver -R64- , Tiptronic system switch -F189- 30a F8 - fuse 8 on fuse holder C -SC8- 7.5A - 16-pin plug connection -T16b- , on diagnosis socket, air humidity sensor -G355- , front left door contour light -L251- , front right door contour light -L252- , rear left door contour light -L253- , rear right door contour light -L254- air humidity, rain and light recognition sensor -G823- , headlight switch -E1- , control unit for cornering light and headlight range adjustment -J745- 30a F9 - fuse 9 on fuse holder C -SC9- 15A - All-wheel drive control unit -J492- 30a F10 - fuse 10 on fuse holder C -SC10- 10A - Multimedia system control unit -E380- 30a F11 - fuse 11 on fuse holder C -SC11- 40A - Vehicle electrical system control unit -J519- 30a F12 - fuse 12 on fuse holder C -SC12- 20A - Information electronics control unit 1 -J794- 30a F13 - fuse 13 on fuse holder C -SC13- 25A - Front left seat belt switch control unit -J854- (for left-hand drive vehicles) 30a - Front right seat belt switch control unit -J855- (for right-hand drive vehicles) F14 - fuse 14 on fuse holder C -SC14- 40A - Fresh air fan control unit -J126- 30a F15 - fuse 15 on fuse holder C -SC15- 10A - Electronic steering column lock control unit -J764- 30a F16 - fuse 16 on fuse holder C -SC16- 5A - Two-way signal amplifier for mobile radio station -J984-, compartment with interface for connecting mobile phone -R265- 30a F17 - fuse 17 on fuse holder C -SC17- 5A - control unit in dash panel insert -J285- , control unit for emergency call module and communication unit -J949- 30a F18 - fuse 18 on fuse holder C -SC18- 7.5A - rear view camera -R189- 30a F19 - fuse 19 on fuse holder C -SC19- 7.5A - Access and Starting System Interface -J965- 30a F20 - fuse 20 on fuse holder C -SC20- 5A - Steering column electronics control unit -J527- 30a F21 - fuse 21 on fuse holder C -SC21- 10A - Control unit for adjustable attenuation electronics -J250- 30a F22 - fuse 22 on fuse holder C -SC22- 15A - Trailer detection control unit -J345- 30a F23 - fuse 23 on fuse holder C -SC23- 20A - Convertible roof control unit -J245- , sunblind control unit -J394- 30a F24 - fuse 24 on fuse holder C -SC24- 40A - Vehicle electrical system control unit -J519- 30a F25 - fuse 25 on fuse holder C -SC25- 30A - Door control unit, driver's side -J386- , rear left electric window motor -V26- (for left-hand drive vehicles) 30a - Door control unit, front passenger side -J387- , rear left power window motor -V26- (for right-hand drive vehicles) F26 - fuse 26 on fuse holder C -SC26- 25A - Vehicle electrical system control unit -J519- (for vehicles with seat heating) 30a F27 - fuse 27 on fuse holder C -SC27- 30A - Vehicle electrical system control unit -J519- 30a F28 - fuse 28 on fuse holder C -SC28- 25A - Trailer detection control unit -J345- 30a F29 - fuse 29 on fuse holder C -SC29- 10A - Pumping device for dosing reducing agent -GX19- 30a F30 - fuse 30 on fuse holder C -SC30- 25A - Rear seat heating control unit -J786- 30a F31 - fuse 31 on fuse holder C -SC31- - not busy F32 - fuse 32 on fuse holder C -SC32- 7.5A - Parking assistant control unit -J446- , Navigation park assist control unit -J791- 15a F33 - fuse 33 on fuse holder C -SC33- 7.5A - Airbag system deactivation indicator on the front passenger side -K145- , Airbag system control unit -J234- 15a F34 - fuse 34 on fuse holder C -SC34- 7.5A - headlight switch -E1- , reversing light switch -F4- , coolant circuit pressure sender -G805- , rear seat heating control unit -J786- , automatic dimming interior rearview mirror -Y7- , sound generator control unit -J869- , air quality sensor -G238- 15a F35 - fuse 35 on fuse holder C -SC35- 7.5A - Plug connection, 16-pin -T16b- , on diagnostic socket front camera for driver assistance systems -R242- , control unit for distance control -J428- 15a F36 - fuse 36 on fuse holder C -SC36- 7.5A - actuator module 1 for right LED headlight -A27- 15a F37 - fuse 37 on fuse holder C -SC37- 7.5A - actuator module 1 for left LED headlight -A31- 15a F38 - fuse 38 on fuse holder C -SC38- 25A - Trailer detection control unit -J345- 30a F39 - fuse 39 on fuse holder C -SC39- 30A - Door control unit, front passenger side -J387- , electric window motor, rear right -V27- (for left-hand drive vehicles) 30a - Door control unit, driver's side -J386- , rear right power window motor -V27- (for right-hand drive vehicles) F40 - fuse 40 on fuse holder C -SC40- 20A - cigarette lighter -U1- , 12V socket -U5- 30a F41 - fuse 41 on fuse holder C -SC41- 25A - Front right seat belt tensioner control unit -J855- (for left-hand drive vehicles) 30a - Front left seat belt tensioner control unit -J854- (for right-hand drive vehicles) F42 - fuse 42 on fuse holder C -SC42- 40A - Vehicle electrical system control unit -J519- 30a F43 - fuse 43 on fuse holder C -SC43- 30A - Soundpaket digital audio recording and playback control unit -J525- 30a F44 - fuse 44 on fuse holder C -SC44- 15A - Trailer detection control unit -J345- 30a F45 - fuse 45 on fuse holder C -SC45- 20A - Driver's seat adjuster thermal fuse 30a F46 - fuse 46 on fuse holder C -SC46- 30A - inverter with socket, 12V-230V -U13- 30a F47 - fuse 47 on fuse holder C -SC47- 15A - Rear window wiper motor -V12- 15a F48 - fuse 48 on fuse holder C -SC48- 10A - Lane change assist control unit -J769- , Lane change assist control unit 2 -J770- 15a F49 - fuse 49 on fuse holder C -SC49- 7.5A - Starter relay 1 -J906- , starter relay 2 -J907- , clutch pedal position sensor -G476- 15a F50 - fuse 50 on fuse holder C -SC50- 30A - Rear bonnet control unit -J605- 30a F51 - fuse 51 on fuse holder C -SC51- 30A - Control unit for reducing agent heating -J891- 30a F52 - fuse 52 on fuse holder C -SC52- 7.5A - voltage converter for usb charging module -A5- 15a F53 - fuse 53 on fuse holder C -SC53- 30A - heated rear window -Z1- 30a

Before 13.03.2023 it was 3V9955425 After this date it is now 3V9955425A (for estates) I cant find any aftermarket version as of yet, so it seems genuine is the only way for the time being.

Done very well! My originals were Perellis and they didnt last 3 years before cracking and falling apart!

Nope, but when I returned to the car the heated seat and steering wheel were left on so id say it was put to good use All that work to look after it and ive got a knocking brake pad problem - when i go forward to reverse and vice versa. The genuine brake pad is almost too loose in the carrier - may end up swapping them for aftermarket pads to see if it cures it.

City driving tends to mean more stopping/starting and tighter turning. id assume this would wear tyres quicker than a constant speed in a fairly straight line. could be wrong on this though, just a theory

MOT completed today, another clean bill of health!

These only use a 0,5mm wire for the tv tuner so no more than 7 amps of current draw. The radio itself will draw more power than the TV tuner. Ive had the tv tuner on for an hour with the car off without issues.

I really like the Goodyear turanza t005 good grip and wet holding in my opinion. But they have slightly started to crack on the shoulders after 2 years. when you say you need new tyres, is it due to tread wear or damage or something else? as there may be a different issue causing premature wear

You first need to check for any fault codes and also the live data of the button itself to see if it’s working. if the button is seen to work by the bcm, then the issue falls to either swap codes or incorrect dataset on the gateway. is this factory fitted or an attempted retrofit?

Id be interested to know what they mean by a fried ecu and what tests were done to determine this. Never really seen an ecu fail without external factors at play. Would also love to see the specific fault codes that were stored. regarding replacing with a used ecu, it will store incorrect data so really a virgin ecu should be fitted. if not, you will still have to run the immobiliser, dataset, adaptions and other routines before it will even consider starting properly

I never get this kind of thinking, everything is electronic nowadays If your house electronics go wrong then you get them fixed, you dont bodge and bypass - at least i hope not! So why not do the same with your car? If you are going to garages that cant fix or diagnose electrical problems, you are going to the wrong place... and as you have started swapping random parts out (without a clue of what youre doing) the car has security features to prevent theft and you cant just swap random immobiliser parts out. Also an EGR is an exhaust gas recirculation system, not an ECU electronic control unit. Long and short of it - no you cant bypass the immobiliser system easily, take it to a qualified mechanic that is able to fix it. If we all had the logic of X worked years ago so why have Y, then we may as well get rid of all electronics and start hunting for food again???

The airbag (SRS) light will come on and stay on when there is a fault in the system. You will need to take it to a garage for diagnosis to see what is faulty and for them to repair. Having the car serviced a few weeks ago will have nothing to do with the airbag light, as the system is so sensitive that if they had damaged something, it would of came on straight away.