N75 locations on 2.0 TDI 170hp (BRD engine)

Hi,

This is my 1st post, hope I have placed this in the right place & appreciate any advice you guys or girls can give.

I have a 2006 Audi A4 S Line Avant 2.0TDI 170 & I want to change the N75's

As I understand it my car has two N75's:
8EO 906 627 C – N75 PRESSURE CONVERTER
&
1K0 906 283 A – N75 MANIFOLD FLAP SOLENOID
Can anyone advise if I am correct in thinking there are indeed two of them & that my part numbers are correct?

I believe the location of the 8EO 906 627 C – N75 PRESSURE CONVERTER is deep down underneath the turbo, is this the correct place to find it?

Also from what I read the 1K0 906 283 A – N75 MANIFOLD FLAP SOLENOID can be located either at the bulk head, or under the air filter box or some where behind the radiator. I've searched this forum and many others trying to find advice on where they are but I just cant find the dam thing under my bonnet.

I appreciate that this question may have been answered before, however it seems I need a little more help from someone, pretty please, its driving me mad!!!

Hi Karl,

Thanks for your reply.

I've had some boost / rough running issues that Audi stealers and a couple of independent dealers cant diagnose as there are "no fault codes, so there is nothing wrong". Even though all who test drive agree that it doesn't get up and go like it should, they say it must be fine as no codes appear! "It's probably just the age of the car" they say.

I've taken some it upon myself to change some (a lot!!!) parts over to eliminate them from the equation. So far I've sourced some bargain price original audi parts by scouring the net waiting for deals to come up for parts on my shopping list. Or just asking some of my European work friends to get hold of them for me

Parts replaced and repair work so far:

Fuel filter
Fuel temp sender
Coolant temp sender
MAP senser
Egr valve (this was found to have excessive play in shaft and was not full closing fully every time by guy doing terra clean)
MAF senser
Clutch and flywheel (nothing to do with running issues just started to slip)
Inlet manifold actuator
Inlet manifold removed and cleaned.
Terra clean and egr/turbo terra clean.
Timing checked ( by stealer)

Nothing happened until I got around to changing the fuel temp senser, coolant temp senser and map sensor in one go and bam.... idle is smoother, car starts better, reduction in smoking and mpg improved by about 3 mpg (all motorway miles & same daily commute for me so easy to monitor)

Encouraged by this I'm prepared to keep changing parts in the hope that performance/boost will improve (the car feels like 120 hp rather than 170 hp.

Got myself a new original n75 for £19 so if I can fit it for nothing it's worth a go.

Regards
Steve

Hi Karl,

Cars done nearly 90k.

Audi did fuel filter foc when they did interim service, so would hope they would have noticed and notified me if fuel was contaminated.

Two audi stealers, one independent and one vw specialist said the same " no fault codes no problem" so I've decided replacing a few simple parts when cheap enough is no big deal before I travel further afield to find someone willing to delve a little deeper.

Have the complete audi history and from that I can see no issues so far with oil pump but has had recall for fuel injectors (all 4 replaced).

I may take your advice and see if I can find someone to do smoke test for boost leaks.

Regards
Steve

FYI got them fitted by local vag garage near my work for £30, I was hoping to post pictures for everyone to see as reference.

Unfortunately I cant do this as the mechanic that fitted them said they are underneath the car and he had to access by removing under engine tray. Bench mark is 3/4hr labour if anyone else is thinking of paying garage for this. I mention this as two other garages said 2 - 2 1/2hrs to fit them !