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VW Passat Family (NMS and B7) TDIs (2012+) Discussion area for the 2012+ Passat TDI (North American and rest of world versions versions). The North American model was previously codenamed NMS (New Midsize Sedan) and the version the rest of the world gets is sometimes referred to as B7.

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Old September 27th, 2018, 23:23   #1
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Default Stage 2 fix observations, 2015 6MT

My car received the phase 2 correction on 9/4, so after a few weeks of driving I have some observations.

My car certainly feels slower after the mod, there is less mid range power than there was before. Previously if I were accelerating moderately and floored the throttle there was a significant pull, now itís much less so. The engine revs up to 3K, but with less exuberance. When pulling a long mountain grade at 75 mph with the cruise set if I gave it some throttle it was pretty responsive and would accelerate easily, not anymore. It still pulls the grade, acceleration is there but unimpressive.

On the good side, it appears that highway MPG is up. On a trip from Flagstaff to Las Vegas it hand calced at 48.2 mpg. My normal commute from Flagstaff to Phoenix round trip returned 45.2 mpg. My previous best on the commute trip was around 43 mpg. City MPG may be down slightly, but I need more data.

Iím not going to tune the car and risk warranty issues. Iím hoping that itís still breaking in the new hardware/software and things will get better.
My Commuter: 2015 Passat TDI SE 6MT, Wifeís Driver: 2015 Touareg TDI Lux

Former TDIís: 2009 Jetta TDI - traded 09/2013, 2011 Touareg TDI - Bought back 2/26/2018
My Truck: 2006 Dodge 2500 4x4 Cummins
Wheelin Rig: 1987 Ford Bronco http://www.supermotors.net/registry/13
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Old September 28th, 2018, 05:41   #2
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Thanks for sharing

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2011 JSW TDI retired and buyback, gone to heaven. almost 300k miles.
2015 Passat TDI with 22k miles on 5/6/2018, completely stock. Black exterior and black interior, 5% tints all around. Now 32k on 9/18/2018.
2014 JSW TDI bought used on 8/26/2018 with 27k miles, white with cornsilk interior. 5% tints, all stock.
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Old October 11th, 2018, 12:57   #3
Knarrly Viking
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Location: Washington

I find it so hard to tell which of my attempts at improving mpg is causing improved or worsened mpg. To make that more clear, I've played with different tire pressures, and generally found more pressure is better, but then the next week, mpgs are down. My wife's car has the stage 2 of the fix. I'm not sure if they did anything with the ecu, but they did install another sensor in the middle of the exhaust pipe. I know this because it looks different than my car (which the dealer says already has the recall done...). My wife gets around 43 mpg, when I get about 50 mpg. No change before or after the recalls. Most of the difference between our cars is the nut behind the wheel. I use engine-breaking and coasting whenever I can. Wife in the summer can get 53mpg on the freeway. This week, I'm averaging 45 mpg. I attribute the 5mpg drop in Costco starting to winterize their fuel or something, because I haven't changed my driving habits, nor has there been a big change in the weather. Now, I did own a 2012 Passat TDI 6MT, and the 2015's get better mpgs hands down.
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Old October 12th, 2018, 05:36   #4
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Location: NH

Trip computer calculations vary a ton, mix a regn in the middle of a 20 mile trip yeah its gonna tank. Miles over gallons is the true way to know the MPG, sure you get the full mix of highway and city driving, but still you'll then know the actual MPG.

Winter fuel most def will hurt mileage, nothing you can really do about that.

Also if you don't have the added sensor that your wifes car, you only have phase 1, you can get phase 2 when ever you'd like.
Hers: 2015 Passat SEL (NOS) w/ VW fix and Malone Stage 2.
His: 2017 Alltrack SE, waiting for TSI to TDI conversion kits to be released.
Bought back 2010 Sedan, cog swapper, build date 07/09, BB 6/7/16. 2012 Passat, Roof+Nav, build date 05/12, BB 7/11
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Old October 12th, 2018, 11:56   #5
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Location: West Hill, Ont. Mexico mid October 2018 to end of April 2019

Originally Posted by Knarrly Viking View Post
My wife's car has the stage 2 of the fix. I'm not sure if they did anything with the ecu, but they did install another sensor in the middle of the exhaust pipe.

Her car received the PHASE 2, Stage 2 is an ECU tune to up HP and torque.

Having said that, for the Phase 2 VW indeed did something to the ECU because of the added sensor.

I know, because my Stage 2 tune would not install again without having it tweaked by Malone.
All LED interior bulbs. Several VCDS mods. Darker window tint. EVO skid-plate. Malone Stage 2, Malone DSG tune. Winpower Projector headlights. Angel eyes. LED DRL's. 24mm H&R rear sway bar. Phase 1 & Phase 2 done.
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