Recent Posts

51

Mk5 General Area / Re: What is the best engine oil to use on Mk5 GTI - standard car no mods

« Last post by GVK on October 20, 2025, 05:52:15 pm »

https://www.castrol.com/en_gb/united-kingdom/home/product-finder.html?page=recommendedProducts&id=42978

Hopefully that should link you to the Castrol oil finder. Recommends 5w30 Alternative Recommendation  0w30 0w40

I would change the oil at least once a year regardless of mileage, I recently did my Scirocco was suprised on the price of oil these days I used Shell 5w30 from Euro car parts! 

52

How to Guides / Troubleshooting / Re: BWA not making boost

« Last post by GVK on October 20, 2025, 05:38:02 pm »

The middle code will be your answer possibly.

It's the N75 valve around the back of the engine that controls boost.

https://www.darksidedevelopments.co.uk/products/pressure-converter-n75-valve-for-vag-2-0-tfsi-petrol-engines.html?srsltid=AfmBOorXNNuYv99XiyNFw6Mu2tEq9Uqe8PknUP29TY0V2rWWZ5x8LOj3

53

Mk5 General Area / What is the best engine oil to use on Mk5 GTI - standard car no mods

« Last post by Nib5y on October 20, 2025, 04:28:20 pm »

Hi everyone, I have been enjoying ownership of my Mk5 GTI now for nearly a month and was wondering what is the best recommended oil to put in her. From service records from Inchcape it looks as if Shell Helix Ultra Pro AV-L 0w30 has been being used but is this correct for the car. currently on 128,000 miles with last service done end of February this year and 3000 miles to date. any advice would be greatly appreciated on which oil to go for and how often to change it. 

54

How to Guides / Troubleshooting / Alternator potentially failing

« Last post by Juubz on October 20, 2025, 03:21:42 pm »

Hello,

I'm driving 05 mk5 gti with AXX engine and recently ive stumbled on a weird electrical issue. While driving randomly the power just cuts out and the engine dies. Straigth after the engine dies, it wont turn on but all the usual electrical stuff works and the starter turns the engine but it wont just start.

If you wait a little while for the battery to level the voltage or just jump it with jumperpack or another car it starts right away and might be fine for a while, and ive usually kept everything electrical to minimum after this and its been able to usually drive home.

Clearly having less electrical load lets it run better and where it dies are related to alot of electrical acecssories turned on and the revs going low while starting or going really slow IE. parking.

Yesterday I just drove in circles and was reading the obd voltage (measured with multimeter and is pretty accurate with battery voltage) and on the linked picture on the right side of the graph, I turned everything on and drove in a circle at low revs and the voltage is just jumping around. Is the most likely problem just a dying alternator since the voltages turned pretty low while abusing it. Battery is new.

In the picture the drop in the middle is the car doing the usual dying while doing really low rev U turn, it started back up with battery booster and then the thick red bar is me doing the abuse test where the voltage was between 14.6 and 13 volts wich seems bad.

55

Mk5 General Area / Re: Highline cluster retrofit.

« Last post by GTI 500 on October 20, 2025, 11:41:00 am »

Cool, thanks, Can't believe there isn't anyone in kent though.

56

Mk5 General Area / Re: Highline cluster retrofit.

« Last post by Stupots on October 20, 2025, 09:55:10 am »

I'm based in Kent and was in the same situation as you. I ended up driving to Great Yarmouth in Norfolk and getting EddieNL (edward1975 on eBay) to code a 3D Tiguan cluster into my Mk5. If you get stuck for someone more local, he really knows his stuff, you could contact him through one of his listings on eBay. All the best.

Stu

57

How to Guides / Troubleshooting / BWA not making boost

« Last post by FraserMH on October 20, 2025, 08:27:42 am »

I'm having an issue on my 2008 Octavia vRS with the 2.0TFSI BWA not making any boost. I ran a code scan which showed:

P0100 - Mass or Volume Air Flow Circuit
P0243 - Turbo/Supercharger Wastegate Solonoid A
P0444 - Evaporative Emission System Purge Control Valve Open Ciruit

I installed a new downpipe a few weeks ago and have had my diverter valve unplugged for a few months with no issues.

I also saw a thread from around 5 years ago with the same issues, but it the thread died before an answer. Does anyone have any experience with this issue, or know where to start looking?

58

Cosmetic/Interior Modifications / Re: Door exit warning lights VERY dim?

« Last post by GTI 500 on October 19, 2025, 08:54:51 pm »

Under what group & how please?

59

Cosmetic/Interior Modifications / Re: Door exit warning lights VERY dim?

« Last post by terrier on October 19, 2025, 05:29:39 pm »

So fitted & coded in power folding mirrors & door exit/warning lights (LEDs), all working BUT are very dim?
I have a 2005 mk5 golf GTI 3 door, & couldn't use pins 18 & 19 as suggested for the exit lights as suggested in the other posts, so used 18 for the positive & pin 1 on both plugs for negative (as my pin 19 was already used)  but both light are very dim.
But when i connect the lights to a 12v they light up bright as you would expect, anyone come across this before & is there a fix or have i done something wrong?

Brightness can be adjusted with VCDS

60

Mk5 General Area / Highline cluster retrofit.

« Last post by GTI 500 on October 19, 2025, 02:23:00 pm »

Anyone in the South East London/Kent area that can code in a highline cluster from my midline cluster?