Jul 23, 2010 · N75 Valve Location for AUDI A4 2007 2.0T. Guest-only advertisement. Register or Log In now! Hello everyone, Before everyone starts saying "use search function" I already have tried searching everywhere. I searched for the N75 location for my car but only thing that pops up is for B5's and not the B7's. Mar 3, 2005 · The side affect of the more aggressive N75 valves is the overboosting that can occur with the adjusted signal from the valve. The overboosting cause AEB to lean out and will send DMW into limp mode. However, by putting a MBC in conjunction with the N75 valve will in all essence allow you to limit or control the overboost that can and most Jul 26, 2007 · 04 Audi A4 B6 1.8TQ S-Line 190bhp 6 Speed Duel SMIC Milltek Exhaust|VMR boost Gauge|SP51 K04-15 Outlaw (K04-23+)|Samco Sport DV|034 Sport CAT (15bhp over stock)|TT MAF| 380 inj| Autobahn88 TIP| To be fitted: B7 RS4 F-Brakes|B5 RS4 R-Brakes|SB Stage4 Clutch| Mar 14, 2012 · I have been losing boost for a while now. It usually doesn't happen all the time, (feel like its lagging boost) but most of the time recently, my audi a4 doesn't have any boost at all. For the past week I don't think the turbo kicked on once. My car is very very slow and I'm loosing gas mileage. Jun 2, 2003 · 17956 - Boost Pressure Regulation Valve (N75): Open Circuit Your car is slugish either because you are in limp mode due to overboosting because of a bad N75 or the N75 is not assisting in the boost regulation and you are only using charge pressure to control boost. Either way, take it to the dealer and have them fix it. May 4, 2008 · noise level in the induction. tract and reduces fuel. consumption. The divert air valve N249, in combination with. the vacuum reservoir, enables the divert air. valves to operate independently of the intake. manifold pressure. The system is designed in such a way that the. pneumatic divert air valves continue to be. Glow plug control unit -J179- Secondary air pump relay -J299- Throttle valve module -J338- Low heat output relay -J359- High heat output relay -J360- Secondary air pump relay 2 -J545- Charge pressure control solenoid valve -N75- Heating resistor for crankcase ventilation -N79- Absorber solenoid valve 1 -N80- Secondary air supply valve -N112 Oct 14, 2011 · But still either way, if one was under the car you should be able to manually move the actuator arm smoothly (assuming the vacuum pipe at the n75 end is temporarily disconnected). 25k or short stop/start miles. the turbo may well be seized up to some degree (hence needing to check if the control rings are jammed up) I trust the cambelt has Genuine Pierburg OEM wastegate frequency control valve. Also known as an N75 valve. A broken N75 valve will cause a loss in boost and overall performance. Common failure on the 2.0T FSI and TSI engines. Please check the part number before ordering. Buy this Audi, VW Wastegate Frequency Control Valve (2.0T, N75) by Genuine OEM now! Jul 6, 2010 · #1 I have a complete loss of turbo boost. Had a broken nipple on the check valve between the vac pump and brake booster, has been replaced. Replaced a very frayed vac line between the n75 and turbo gate activator. Have good vac level up to the valve, and if i bypass it, connecting the vac line straight to the turbo activator, i get boost just fine. J9JA.