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E63 / E64 6 Series (2004 - 2010)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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  #1  
Old 08-30-2015, 07:28 AM
M6 freak M6 freak is offline
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Location: Canton, MI
 
Join Date: Aug 2015
Posts: 1
Mein Auto: M6 cabriolet
M6 or 650i

Hi everyone.
I am a newbie to the forum and have not purchased my BMW yet.
I was completely sold on the idea of a 2007-2008 M6 cabriolet but after reading lots of posts, it seems as though there are some problems with the SMG tranny which can be very expensive to repair.
Now I have expanded my search to include a 650i cabrio.
I love the sound of a V-10 but am willing to do a V-8 auto if the reliability is going to increase.
Can anyone elaborate on the pros and cons of each.
Thanks in advance.
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  #2  
Old 08-30-2015, 09:12 AM
roseng's Avatar
roseng roseng is offline
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Location: Calabasas, CA
 
Join Date: Apr 2006
Posts: 1,766
Mein Auto: 2014 528i + 2007 650 Vert
Quote:
Originally Posted by M6 freak View Post
Hi everyone.
I am a newbie to the forum and have not purchased my BMW yet.
I was completely sold on the idea of a 2007-2008 M6 cabriolet but after reading lots of posts, it seems as though there are some problems with the SMG tranny which can be very expensive to repair.
Now I have expanded my search to include a 650i cabrio.
I love the sound of a V-10 but am willing to do a V-8 auto if the reliability is going to increase.
Can anyone elaborate on the pros and cons of each.
Thanks in advance.
I have an 07 E64 and I love it. I'm also a member of the M6 forum and I have a close friend with an 07 M6.

For me the 650 is very powerful and everything I want in a car. The M6 is an amazingly powerful car but so powerful it's uncomfortable to drive in regular traffic. The SMG transmission as well as engine bearings and other problems would make me concerned about purchasing the M6.

Granted not everyone has significant issues, but do some reading on the M6 form before seriously considering The Beast. It's a wonderful thing if you want a race car that looks like a regular car. It's truly a wolf in sheep's clothing. But with that comes the maintenance and headaches of a supercar.

http://www.m5board.com/vbulletin/e63...e-m6board-com/


Good luck and let us know what you decide .
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I Love LA. It lets me ride in the winter with the top down.
07' E64/Black....14' F10/M-Sport White

Last edited by roseng; 08-30-2015 at 09:46 AM.
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  #3  
Old 08-30-2015, 09:23 AM
HerbP HerbP is offline
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Location: Georgia
 
Join Date: Jul 2009
Posts: 3,392
Mein Auto: 2005 645Ci & 2007 750Li
Well stated Gary!
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  #4  
Old 08-30-2015, 02:58 PM
rebel.ranter rebel.ranter is offline
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Location: Cork, Ireland
 
Join Date: Jul 2007
Posts: 605
Mein Auto: 630i, 525i, 320iC
I have a 630i and an M6, both with the SMG gearbox. Previously I had an e39 auto, no,question that the auto is much smoother but the SMG can be driven smoother too once you get used to it.
I have yet to hit an SMG issue with either car and I've had the 630i for 4.5 years & have driven it 70k miles so far.

I recently did some research on the specifics of what goes wrong with SMG, it is not a frightening as all those stories that you read on the forums where warranty claims are made. There are two main failures, the SMG pump or the slave cylinder seal failure. The SMG pump is overwhelmingly the primary cause of failure. BMW normally swapped out the entire SMG unit when they were doing warranty work, however there is a pump repair kit for about $400-450. The "repair kit" is actually a new pump. The labour to replace is DIY if you have DIS software (which every e63/e64 owner should have!). You need some fresh Pentosin CHF 11S oil too to refill the hydraulic system.

So with that issue out of the way now which car should you go for? Well the M6 is a beast! There is no discreet mode! Especially when starting first thing in the morning or after it is parked up all day after work! The v10 soundtrack is awesome, with peak power at 8,200rpm! The suspension is stiffer than the 650i, the brakes are better. The fuel economy, well there's no fuel economy! All engines have their foibles, the bearing shells seems to be the horror story for the M6 and it's the valve stems seals is the failure issue for the 650i.

I would seek out an M6 with manufacturer warranty if you can. I picked mine up in February with a 2 year BMW warranty, and boy am I glad I did! Replaced sor far: brake master cylinder, brake servo, brake DSC Unit, fuel tank, carbon canister, 1 x ignition oil, heather mixer valve , head up do splay, fuel tank sender, boot carpet. I also had issues with the illuminated door sills (not lighting up) which was not covered, two mid range speakers which failed but I swapped them out myself as I didn't want the dealer making a mess of my interior!
Awesome car with eye watering running costs compared to my 630i (3 litre N52 engined 6 series, available here in Europe, not US, same engine as in the 530i).
Whatever you choose good luck!





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Current cars
1996 e36 320iC (convertible)
2006 e63 630i Sport w/SMG
2007 e63 M6


Previous Cars: 2002 e39 525iA Sport, 1994 e36 318i, 1990 e34 520i, 1989 e30 325i, 1986 e30 316

Last edited by rebel.ranter; 08-30-2015 at 10:34 PM. Reason: Changed To N52
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  #5  
Old 08-30-2015, 07:00 PM
u3b3rg33k u3b3rg33k is offline
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Location: USA
 
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Posts: 1,631
Mein Auto: e30, e60, R1100S
Did you mean n52?
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e30: '87 325i: MAF+WAR chip, long tube STAHL headers, 5MT swap, 4.27 torsen
e60: '08 550i M-sport, 6MT, ARC, Active Steering, 19" wheel delete
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Originally Posted by MeNoo View Post
Although I have nothing scientific to say, I can confidently say that it works.
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  #6  
Old 08-30-2015, 09:15 PM
KwlAznKid KwlAznKid is offline
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Location: Los Angeles/Fremont
 
Join Date: Nov 2004
Posts: 87
Mein Auto: E46 325 CI
i just bought a 650i and seriously debated getting the m6 as well. but in the end i figured the 650i was the best choice for me given my current situation so i think it really depends on what you are looking for in a car, i went through the same research as you and read all about the smg issues.. the m6s i were considering were higher millage than the 650is and also coupes (as opposed to the 650i vert). color was also all black or grey (not my personal preference) as opposed to the 650i white (one of my favorite colors) so.. when it all came down to it i went with the 650i! good luck with your decision, it's a tough one i will admit!
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BMW E92 335I (SOLD) / BMW E46 M3 (SOLD)
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  #7  
Old 08-30-2015, 10:30 PM
rebel.ranter rebel.ranter is offline
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Location: Cork, Ireland
 
Join Date: Jul 2007
Posts: 605
Mein Auto: 630i, 525i, 320iC
Quote:
Originally Posted by u3b3rg33k View Post
Did you mean n52?
Yep you are correct!
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