TD-04 turbocharger compatibility: 2006+ cars vs. older models - SaabCentral Forums
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Old 28th May 2019
andybisnut andybisnut is offline
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Join Date: Jun 2013                                                
Location: Minnesota
My Saabs: 2006 9-5 SportCombi 2.3T
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Default TD-04 turbocharger compatibility: 2006+ cars vs. older models

Hi guys,

Owner of a 2006 9-5 here.

I know that Saab changed the length of the "inducer nose" on the TD-04 turbocharger starting in 2006, to accommodate the king cobra pipe.

It seems that this turbo is compatible with older cars (pre-2006). My assumption is that you'd have to also update to the king cobra pipe to make it work with a pre-2006 car.

So my question is: Is there any way a TD-04 from an older car, say MY 2004, could work in the 2006+ cars? I'm thinking a turbo replacement might be in the works down the road (mine does a faint "police siren" noise** at low RPM), and I have a buddy who has a completely rebuilt TD-04 that he'd be willing to sell me. But I think it came out of a pre-2006 car, so I'm not sure that it will work. Thoughts?

**Note: I will say, my car has been doing this noise for quite a while now (only at low RPM). At least 15,000 miles. The Internet says that the "police siren" noise is a sign of impending turbo failure, although some forum threads I've read say their car has been doing it forever without drive-ability issues. I'll keep an eye on it. Just trying to plan for the worst. Maybe nothing will happen.
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