I would expect to see improvements in performance, economy and emissions, on something like an '08-build Tiguan.
Especially on cars that have never had the ECU flashed (by VW) previously.
We've come a long way in virtually 10 years of CR TDI technology and know-how.
But that's my $0.02
'07 Transporter 1.9 TDI
'01 Beetle 2.0
Performance Tunes from $850Wrecking RS OCTAVIA 2 Link
Tiguan TDI, 6spd Tiptronic Auto
Black, sunroof, comfort pack, off-road tech, tan leather, park assist & roof bars.
Avg 7.63L/100km over 189,000kms
Keep in mind that there were the factory software updates for the VAG engines before the emission fix, which definitely improved fuel economy and reduced the turbo lag. I've done quite a lot of them. But, I'll personally void getting the current emission fix or what ever they want to call it in our family cars.
Performance Tunes from $850Wrecking RS OCTAVIA 2 Link
Daily: 2010 Tiguan TDI | Candy White | Manual | 4MOTION | New York Wheels | Comfort Pack | Tinted Windows | Discover Media | MkVI MFSW | Mk7 Climatronic | RVC | Fog Lights | ECB Nudge Bar | Hella 160 Driving Lights | Rola RBXL135 Cross Bars | To Do: Colour MFD
Toy: 2008 GTI Pirelli | Sunflower Yellow | 3 Door | DSG | Pirelli Wheels | RNS-510 | 9W7 Bluetooth | RVC | Rear Sensors | Fog Lights | To Do: Mk7 Climatronics, MkVI MFSW, Colour MFD
The emissions components largely remained the same, until around 2011 for most models. T5GP (MY10, '09 builds) was the exception, already using the later generation engines, etc. But year on year, there were performance/emissions/economy improvements made, as mapping was refined, presumably for the purposes of marketing. The emissions-friendly coding would have still been there regardless.
I feel that in your case, you won't be any worse off, performance and economy-wise.
Alternatively, you could shell out the extra pesos, flash an aftermarket tune into it, and completely disregard emissions altogether
'07 Transporter 1.9 TDI
'01 Beetle 2.0
Performance Tunes from $850Wrecking RS OCTAVIA 2 Link
Just got a letter from the dealership I bought the Tiguan from. It seems they're offering a sweetener to help convince those on the fence to do the recall.
Tiguan TDI, 6spd Tiptronic Auto
Black, sunroof, comfort pack, off-road tech, tan leather, park assist & roof bars.
Avg 7.63L/100km over 189,000kms
If you're worried about the future updates, that they say, you won't get if you don't get the emissions update done.
Don't worry, there weren't many, I could almost say, next to none engine software updates once the car's years out of warranty.
Certainly, I wouldn't hope that they would sent you a letter to have your car's software update done free of charge, unless it's emission recall or some safety recall in which case they'd apply the current one as well.
Performance Tunes from $850Wrecking RS OCTAVIA 2 Link
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