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E89 Facelift - AC Compressor

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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Gwest44
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E89 Facelift - AC Compressor

Post by Gwest44 » Tue Jan 24, 2023 11:36 am

I've recently been looking at late production (2015) facelift cars and noticed the 18i variant has a different AC system to the other models.
In the brochure it's listed as having automatic AC with single-zone control as opposed two-zone control in the other models.
In my previous E89's they have all had the two-zone option but 2 of them had to have the AC compressor replaced because it had failed.
I was wondering if anyone had experienced both systems and had an ability to comment on whether there were any disadvantages of the single-zone system shown in the first photo below - the second photo is the two-zone system.
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Sapphire Black 23i
Previously 7xZ3's, 5xE85's, 2xE86's & 3xE89's

Silverstar
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E89 Facelift - AC Compressor

Post by Silverstar » Tue Jan 24, 2023 12:20 pm

Sorry I can't speak about the difference in reliability between one system or the other but the difference isn't just single zone or dual zone.

In the more basic version as fitted to the 18i it is single zone manual air con. You can see that by the AUTO label on the one with dual zone whereas it just says A/C on the single zone version. The dual zone version is climate control whereby it constantly monitors the interior temperature and makes sure it is at the temperature set by the user.
2009 sdrive30i auto Sapphire Black / Coral Red

Gwest44
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E89 Facelift - AC Compressor

Post by Gwest44 » Tue Jan 24, 2023 6:09 pm

Silverstar wrote: Tue Jan 24, 2023 12:20 pm In the more basic version as fitted to the 18i it is single zone manual air con.
See what you're saying but then the brochure definitely refers to automatic - see picture.
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Sapphire Black 23i
Previously 7xZ3's, 5xE85's, 2xE86's & 3xE89's

Silverstar
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E89 Facelift - AC Compressor

Post by Silverstar » Tue Jan 24, 2023 6:51 pm

Must be a misprint in the brochure I think. For the other cars like the 1, 3 series etc. they always offered a base manual air con and as an option or included in certain trim levels automatic climate control.
2009 sdrive30i auto Sapphire Black / Coral Red

Pondrew
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E89 Facelift - AC Compressor

Post by Pondrew » Tue Jan 24, 2023 7:53 pm

18i has manual a/c, 20i and up have dual zone 'climate control.' Only differences are the controls, more air flaps and more sensors with the climate control version. The blurb must be a misprint.
As far as compressors and the mechanical a/c system is concerned, there is no difference. One is not more likely to fail than the other TBH.
All good things come to those who wait. I'm really impatient which explains a lot.

F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!

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