Audi A4 2.0 TFSI. Coolant Loss. Thermal Management 

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Great vid. Had exact same issue on my 2013 A5 2.0 tfsi at around same miles, took to garage (not dealer) and had to cough up £1700. This was in 2019 and tonight it looks like it's done it again, engine temp reading zero after long drive, coolant below minimum and fans on full whack. Just ordered the part and will have a go myself this time thanks to your vid

I’ve watched many “how to fix…..” for my 2013 VW Tiguan as I cannot afford a shop visit as well as I get a sense of accomplishment and pride when I complete a problem with any of my vehicles currently and it previously. And I must say - this is the best video I have ever watched. It is the most enjoyable informative; most explained; most easy to understand and most importantly most easy to follow step by step showing of any process … that I have watched thus far. I’ll go even further than just videos for Volkswagens and I will say out of any video for any car repair I’ve ever watched and I 100 percent appreciate that. This you tube channel / person is going to the top of my favorite list and I have no doubt that my coolant leak problem will be solved and fixed by yours truly by the end of the week. Thanks to this video.

It's one of the most informative videos I've watched for a while. Thanks for taking the time to make it.

Had an insane coolant leak in my 2019 A4. Had a look around and turns out it's this exact same spot too. Thanks for the video!

Great vid Dave.. thanks for taking the time to make, this will help tremendously with trying to locate a leak on wifie"s new used car with only 78000KM.

The very definition of over engineered, thanks for taking the time to make the video Dave.

Replaced mine couple days ago, I only took off intake manifold then water pump. Left the piping and coolant tank on. Wasn’t fun but took 4 hours to remove and install. Your video helped a lot. I’m a HD guy working on cars never been my thing but it was do it myself or 1500$ at Audi

Thanks Dave, that's something else that I wasn't aware of before watching your video. Cheers mate

Cheers Dave , as usual great video , and now have another wee peice of knowledge I didn’t have 40 mins ago , 👍

Just using you video as a reference for a coolant module leak on a TSI GOLF GTI . Thanks Dave 😉

Dave, I wanted to say thank you. I spent three days looking for information on the 2017 Audi A4 B9 water pump and thermostat system. I found nothing. Everything seemed to be geared towards B8s. So armed with what I thought was sound advice I purchased a new pump and want to work Saturday installing it. Only to find that did not solve my engine coolant low flow fault. Plus the bottom hose never gets hot, despite having flow into the top of the overflow bottle. I now believe, especially after your video it must be the thermal management unit. So $450 from the local dealer and I will be replacing that tonight. Not sure how I found your video, but thank you for the in-depth information.

Great information Dave, it's quite the unit with lots of potential for leaks...

I have never encountered one of those types of coolant pumps, they seem to be calling a lot of added on bits ‘modules’ nowadays. Very interesting and informative video Dave 😉👍

Very informative repair Dave, these cooling systems are getting ever more complicated.

So much details on your video. If it was me i would definitely try to fix the old part. Just to see if i can save some money on the future for my loyal customers. Regards

Great video Dave. Very complicated coolant system

A large and sophisticated pump, Parts that do not last, Shame on Audi. Great video, keep it up.

Certainly did get something out of it very interesting thank you Dave.

Looks like things have come a long way from the Model T’s cooling system. Its pump never failed...Of course...it never had one 🤣 Your becoming an Auto Union specialist. Good Vid. Cheers Dave 👍

I had one of these leaking last year. It was repaired at the dealership under warranty. Best thing really. The customer seemed to think it was my problem. I politely explained that I hadn’t designed the over complicated system. Great video again. Thank you

In other words they know it's a screwed up and faulty design, but if they can get out of warranty without the customer noticing and complaining keep your mouth shut and let if fail after the warranty is up. Sounds about right. I'm researching this issue for my buddie's less than a year out of warranty Audi that is mysteriously losing coolant but he cannot find the leak.

Great video Dave... common problem on these EA888 engines. Golf R - GTI - S3 all have the same issue. A mate had his fail after 7000miles on his brand new Golf R.

Pretty awesome video. My Wife’s 2018 Q5 has a minor leak on the thermostat housing according to the dealer and they are charging $1600+ for the repairs. Thank God! I’m a Bosch certified Technician and I can replace the part myself. The part alone is $600+

Nice Dave. Some real world stuff. I haven't come across this system yet. Looks expensive.

Excellent video and I’m now about to follow the process you’ve so helpfully documented. One question, where did you source the INA pump?

I own this exact year and model very informative video thank you hopefully I never have to use it 😳 lol thanks for posting this 👍

Very in depth review and fix Dave. Bleed'n typical VAG response not to fix unless customer complains. Obviously history on this car and probably could have been fixed under warranty. Half these parts don't do what they are meant to do!

great info there thanks for the vid ,fairly easy diagnosing a leak but what happens when one of those valves go wonky.

That was super helpful thank you

Good info. Great channel. 👍

great video dave ,have alook at your coolant in the bucket it formed a pic of a bird even the eye rob

All ways find the rad cap overlooked and to test it..lol.. Plastic vane of my life great video thanks interesting..

Excellent video. I'm having the same issue with my car. Audi quoted me $1300 part and labor. Sigh. Car is low miles too.

My Audi TT 2015 loses half of the expansion tank coolant in 3 months. However no traces of any significant “crystallisations” and white stains on the engine parts from the leaking coolant. The compression test was good. Which makes me think that the leak is slow/small and steady. Probably the fluid evaporates.

Jat had my '17 A4 B9 back from the dealer for a warranty recall on passenger occupancy sensor. they also wanted to add I my thermostat housing is leaking slowly (I didn't even know, must be a VERY slow leak). "slight white marks - no customer complaint - haha". quoted me $1756 the swines. I can get he housing with pump INA for $450. whats the skin on my knuckles worth though?

Toilet break 🤣 Done a similar module on a transverse engine A3, not for a leak though, for an overheat at cruising speed condition. The motor that moves the ball valves has a wee brass pinion that had fallen off ! I didn’t take that wee left hand thread bolt out, I was worried that I could make the timing chain jump by cranking on that bolt. I used an INA part too. Could see where the Audi logo had been buffed off it after it was moulded.

Does this apply to the 2017 Audi Q7

Could you put link for the part please

What were the torque specs for the throttle body

Hola , excelente información podría hacer un vídeo relacionado con la electrónica del.fumcionamiemto de la misma bomba ya más desglosado sobre los componentes que mueven los pasajes a través de la computadora gracias

My Q5 is having coolant loss for the last 2 years. Audi changed the water pump, coolant tank, radiator, some of the hoses and didn't solved the issue. Went to another audi specialist workshop. They replaced radiator, coolant tank, more hoses. Nothing got resolved. Coolant only last about 7 weeks. I am from a tropical country. Seems like no one can solve this.

Hi dave, do you recommend in checking this module & belt if buying the likes of an A5 tfsi model or do they have to be replaced at a certain mileage interval??

Haven't done one of these yet, good referral info for when I do! Also is it just me or is there a perfect shape of a chicken in your drain bucket at 13:04! 😁

I have replaced mine on my 2018 2 times at the dealer. Just received a campaign reimbursement form from audi regarding the water pump failures on audi models and years that have these failures with less then 80k miles. They will replace for free or reimburse me if I had it replaced.

Hello Dave, can you tell me with which brand is better to replace it INA,GRAF,PIERBURG,HEPU,DAYCO,MEYLE,VEMO? Best regards from Slovenija

same milage hade to change my water pump so...

Looking at 2017 A5 dkza engine which years do not have this problem, is there a revised part number,if it been resolved. Thanks

Question I have a 2018 a4 b9 2.0t. TFSI QUATTRO. The coolant is leaking from both sides of the engine it’s coming out of the starter where it mounts in the the fly wheel. Also dripping out of the flywheel inspection port and dripping down the drivers side on to the rack n pinion

Thanks for the video... I have the Audi A4 Allroad early 2018 with the 2.0tfsi 252 engine.... So my vehicle had the same symptoms.. investigation reveals the leak at exactly the same piece... So ill be getting a new piece and will also get the expansion bottle and cap changed at the same time... These are also known to fail.. Do you think that the unit could be repaired? These cost 350-400€ plus labour.. my plan is to buy a new one and keep the old if i can fix it.. - as a future back up, although hoping the latest version is free of problems..

So I read in the Audi factory manual that you have to reset the adaptation of the thermostat after a new one is installed. Don't know how important that is but.

Got in my 2018 A5 yesterday AM and got the scream of death warning, so shut down immediately. Upon inspection coolant tank was almost empty! All I had was the green stuff so filled it with that and got on the road. Looked tonight and saw no spray marks, no smell of coolant burn, only saw liquid pooling in front just past radiator on drivers side. Researched a bit and saw a recall for some years for bad water pump, symptoms coolant loss and if you don’t catch it in time catastrophic engine failure of course. Thoughts, help anyone???!!!

So I've replaced the waterpump + thermostat housing and in less than 10k km it's leaking again. All OE parts! I am considering to go with INA 538 0360 10 this time.. I know the OE one is built by Schaeffler INA. Is there any difference between the OE or INA without OE brandings? Or do you know something better than this? Thank you!

Top job thanks for explaining another automotive technology nightmare😂the more they fix it the more broken it becomes😂🤣😂

Where did you get the tsb info? Is there no way to repair it? Module roughly costs upwards of £300 wow.

What a nightmare these new vag cooling systems seem to be Dave, good for business I suppose though lol

Very common on these engines do quite alot on vw and audi 2.0tfsi

👍

Excellent video Dave, yet again VW make another part that's not upto the job , over complicated junk , same idea on late small skoda units , stupid drive belt , these are definitely not a 711m, 16 minute water pump change outside your house on a Saturday morning, should be changed on goodwill as crap design and unreliable inferior built parts

Just so y’all know. Audi extended the warrant on the water pumps for Audi a4s. Coverage will be given to cars with under 80k miles or 8 years or less after production……all covered by Audi…

really wish you wouldve showed how you took those pipes out to get to the thermostat housing. kinda step 1 Edit: I’m not even sure why I bothered watching this video at all you did a good job explaining a lot of stuff nobody needs to know and skipping essential stuff people need to know. Didn’t even bother to show how to take off the boost pipe or the metal bracket with a 12-point female screw. If I could give this 100 thumbs down I would

maybe he doesnt remember and hes been driving 500miles a week

Audi sucks. My wife's car is the biggest piece of crap ever. This company can't make a radiator that lasts 80,000 miles. What a joke.