Mini Cooper CVT problem - solved! - MINI Cooper Forum
Go Back   MINI Cooper Forum > MINI Technical Forums > MINI Faults & Fixes > First Generation Faults & Fixes


First Generation Faults & Fixes MINI faults and fixes 2001 - 2006

Mini2.com is the premier Mini Cooper Forum on the internet. Registered Users do not see the above ads.
Reply
Similar Threads
Thread Thread Starter Forum Replies Last Post
Dying battery problem solved 2005 Mini Cooper S w/GPS MiniBry First Generation Faults & Fixes 2 Aug 12th, 2010 02:51 PM
cracking windshield problem solved? dav General Discussion 4 Sep 5th, 2003 04:02 AM
Airbag Problem Solved MIN 106 First Generation Faults & Fixes 0 Jan 3rd, 2003 08:13 AM
Ignition problem solved (well for now!) kbgnat First Generation Faults & Fixes 6 Mar 24th, 2002 07:06 AM

 
LinkBack Thread Tools Rate Thread
  #1 (permalink)  
Old May 11th, 2011, 10:53 AM
MINI2 Newbie
Offline
 
Join Date: May 2011
Posts: 2
Local Time: 07:06 AM
United Kingdom
Mini Cooper CVT problem - solved!

We bought a Mini Cooper with the famous CVT gearbox three years ago and it wasn't right from the start, but not having driven a Mini with a CVT we just thought it was the deficiencies of the system.

The car was bought with just 14,000 miles on the clock, even though it was an '03 model. The car was slow to pull away, the delay from standstill to selecting the correct gear was a second or so.

This continually got worse to a point where the car would pull away reasonably, but immediately the CVT would select a very low ratio (akin to 5th gear or so) and the acceleration was awful. Eventually we got the dreaded 'EP' and the car drove like a wheezy moped.

I cleared the error codes (different each time) using INPA, and that got it going again for a few days - but it very quickly reverted to awful performance and another Emergency Program warning.

We took it to BMW (Snows in Portsmouth) to get the gearbox oil changed as a first line of attack, and to have them diagnose what the problem was. They reported that the gearbox seemed fine after a 'gearbox reset' and the oil change. It took only a few miles before all the symptoms were back again.

Something on the INPA diagnostics report caught my eye though, and that was the battery voltage which was 14.9V, which is much too high, especially at tick-over. I know that the reported battery voltage is not that accurate, but that was certainly wrong - I decided to replace the battery.

And that cured all the problems! Although the car always started fine, the battery was failing. The car is now extremely lively, chooses the correct gears, pulls away quicker - in fact, it seems like a new car. The battery was changed over 5000 miles ago now and the CVT is working extremely well.

So, if you have CVT problems, try changing the gearbox oil and your battery before giving up.
Reply With Quote
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old May 14th, 2011, 02:39 AM
Sejanus's Avatar
MINI2 Premium Member
MINI2 Global Moderator
Online
 
Join Date: Feb 2002
Location: West Sacramento
Posts: 4,896
Local Time: 12:06 AM
United States Male View Sejanus's Chili Red & White 1st Gen MINI Cooper Profile
Good to know. Nice detective work. Sadly though the problems you experienced aren't typical of the classic CVT failure.

Reply With Quote
  #3 (permalink)  
Old May 14th, 2011, 06:13 AM
MINI2 Regular
Offline
 
Join Date: Dec 2006
Location: Calgary, AB, Canada
Posts: 52
Local Time: 12:06 AM
Canada Male
What is the relationship between battery voltage and CVT function? Normal battery voltage under full charge is just over 14 volts. Resting voltage after sitting overnight should be around 12.5+ volts. So what you're saying is that your old battery was getting overcharged? What is it now? Isn't a too high a voltage an issue to do with the charging system?

BTW, my '05 CVT is still working very well (for those who have been following my posts on this topic).
Reply With Quote
  #4 (permalink)  
Old May 22nd, 2012, 05:37 PM
MINI2 Newbie
Offline
 
Join Date: May 2011
Posts: 2
Local Time: 07:06 AM
United Kingdom
Update 1-year later

The CVT is still operating faultlessly one year since my last post. My guess as to the reason the battery caused the failure would be the increased series resistance of it - a consequence of under charging and eventual Sulphation. A battery in that condition would not stabilize the alternator voltage effectively giving widely ranging output voltage, something that the Mini electronics was not happy with!
Reply With Quote
Thanks for this post from:
  #5 (permalink)  
Old Jul 31st, 2012, 09:37 PM
MINI2 Regular
Offline
 
Join Date: Sep 2010
Posts: 115
Local Time: 07:06 AM
Israel
what is the correct amperage of 2002 Mini One (R50)? CVT?
thanks
Reply With Quote
  #6 (permalink)  
Old Nov 21st, 2012, 06:39 PM
MINI2 Newbie
Offline
 
Join Date: Nov 2012
Posts: 1
Local Time: 07:06 AM
Timm you saved my mini

Timm,

I read your post and I was so surprised that my MINI was experiencing the same issues. I have a 2008 Mini Cooper Convertible.

Anyway, unfortunately I'm stationed in Bahrain so I had to take my Mini into a kinda Mini Cooper Dealer. They are more BMW but have a small small section of Mini Coopers. So basically they said "you need a new transmission, $4000BD ($10,638). I said no and took my car home. Fortunately, I knew that I had already needed a battery so after I saw your post I scheduled my car for a battery change. Now all good in the neighborhood. My car is back to normal.

THANKS for posting!!!!!!!!!!
Reply With Quote
  #7 (permalink)  
Old Feb 10th, 2014, 09:57 PM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 2
Local Time: 07:06 AM
United Kingdom
Another Mini owner (sort of - see below) popping on to thank the OP for this invaluable thread.

My Mum was experiences issues with her 2006 Mini One Automatic and had already spent considerable money chasing an unknown fault with specialist Mini/BMW garages. After receiving an extremely large quote to (possibly!) fix the problem, I decided to do a bit of research before she bit the bullet and went ahead with the work.

I found plenty of people suffering similar woes, but only two which had solved the problem - this thread being the most detailed. It seemed unlikely (the garage that had given her the quote actually laughed/sneered at the ridiculousness of her son's Googled battery theory) but was worth a try before shelling out hard earned funds.

One replaced battery and nearly four months of issue-free driving later it's me who's had the last laugh.

So MCF and VCMini, thanks for saving my Mum a whole heap of cash and making me look like a hero.
Reply With Quote
  #8 (permalink)  
Old Feb 10th, 2014, 10:35 PM
Sejanus's Avatar
MINI2 Premium Member
MINI2 Global Moderator
Online
 
Join Date: Feb 2002
Location: West Sacramento
Posts: 4,896
Local Time: 12:06 AM
United States Male View Sejanus's Chili Red & White 1st Gen MINI Cooper Profile
This is Interesting since neither vcmini or rmad have CVT transmissions like Timm did. Apparently this battery problem impacts regular automatic transmissions as well.

Reply With Quote
  #9 (permalink)  
Old Feb 11th, 2014, 09:44 AM
MINI2 Newbie
Offline
 
Join Date: Feb 2014
Posts: 2
Local Time: 07:06 AM
United Kingdom
Hi Sejanus, I obviously can't speak for VCMini but I'm pretty confident my Mum's Mini is equipped with the CVT.
Reply With Quote
  #10 (permalink)  
Old Feb 11th, 2014, 03:25 PM
Sejanus's Avatar
MINI2 Premium Member
MINI2 Global Moderator
Online
 
Join Date: Feb 2002
Location: West Sacramento
Posts: 4,896
Local Time: 12:06 AM
United States Male View Sejanus's Chili Red & White 1st Gen MINI Cooper Profile
Probably my mistake. I was thinking that 2005 was the last year for the CVT, but perhaps it was 2006.

Reply With Quote
Sponsored Links
Advertisement
 
Reply
Tags: , ,



Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 
Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Dying battery problem solved 2005 Mini Cooper S w/GPS MiniBry First Generation Faults & Fixes 2 Aug 12th, 2010 02:51 PM
cracking windshield problem solved? dav General Discussion 4 Sep 5th, 2003 04:02 AM
Airbag Problem Solved MIN 106 First Generation Faults & Fixes 0 Jan 3rd, 2003 08:13 AM
Ignition problem solved (well for now!) kbgnat First Generation Faults & Fixes 6 Mar 24th, 2002 07:06 AM

» Recent Threads
Facelift ('05) Confusion
Yesterday 05:26 PM
by Triang
Last post by Triang
Today 04:58 AM
7 Replies, 170 Views
How to Retrofit the Spacesaver Spare Wheel
Dec 6th, 2011 10:40 PM
by mab01uk
Last post by mab01uk
Yesterday 10:25 PM
46 Replies, 29,580 Views
Trunk Handle Cover
Yesterday 02:39 AM
by iamtony
Last post by whaap
Yesterday 09:23 PM
3 Replies, 171 Views
2007 Cooper D (r56) - weird sound. Maybe clutch?
Yesterday 07:01 PM
by hyvrid
Last post by hyvrid
Yesterday 09:20 PM
2 Replies, 100 Views
2007 Cooper D (r56) - How to look after her and what to look for when buying
Apr 15th, 2014 01:10 PM
by hyvrid
Last post by hyvrid
Yesterday 08:11 PM
7 Replies, 436 Views
O2 sensors in exhaust
Apr 18th, 2014 06:03 PM
Last post by Invernessguy
Yesterday 07:22 PM
4 Replies, 251 Views
Mini One dipstick
Apr 14th, 2014 04:22 PM
by pooz23
Last post by drozd
Yesterday 07:06 PM
6 Replies, 290 Views
High Mileage 152k miles - Mini One 04 plate
Jan 31st, 2014 09:43 AM
by raym
Last post by Triang
Yesterday 05:46 PM
8 Replies, 1,433 Views
Facelift One ('05) Confusion...may have posted in wrong place sorry!
Yesterday 05:37 PM
by Triang
Last post by Triang
Yesterday 05:37 PM
0 Replies, 162 Views
Mini Identification
Yesterday 10:23 AM
Last post by subframe
Yesterday 05:21 PM
8 Replies, 195 Views
Roof Rack
Yesterday 03:17 PM
by vnutz
Last post by vnutz
Yesterday 03:17 PM
0 Replies, 101 Views
Should i buy a Mini Cooper r50
Feb 14th, 2012 01:09 AM
by MENESS
Last post by Milpol
Yesterday 12:58 AM
13 Replies, 8,004 Views
Replacement driver side door handle **new member**
Apr 14th, 2014 10:32 PM
Last post by The Nun
Apr 19th, 2014 06:43 PM
3 Replies, 301 Views
R52 A pillar interior trim removal
Apr 18th, 2014 08:11 AM
Last post by clockworks
Apr 19th, 2014 01:10 PM
3 Replies, 232 Views
Drivers Selt Belt PreTensionor / AirBag Fault Light
Apr 19th, 2014 12:20 PM
Last post by da8addick
Apr 19th, 2014 12:20 PM
0 Replies, 161 Views
Black rims for 195/55r16 run flats?
Mar 2nd, 2014 03:59 AM
Last post by habi222
Apr 19th, 2014 12:18 PM
1 Replies, 403 Views
Tyre Sizes
Feb 17th, 2014 10:32 AM
by danb76
Last post by habi222
Apr 19th, 2014 12:00 PM
3 Replies, 630 Views
Paint Code for Mini Steel Wheels
Mar 16th, 2014 03:59 PM
Last post by habi222
Apr 19th, 2014 11:56 AM
6 Replies, 585 Views
Downgrading Rims
Mar 11th, 2014 09:52 AM
by Timbozy
Last post by habi222
Apr 19th, 2014 11:51 AM
6 Replies, 551 Views
Adding multiple 12v power sockets / cigarette lighters and USB
Apr 19th, 2014 11:47 AM
Last post by zero_cool
Apr 19th, 2014 11:47 AM
0 Replies, 510 Views
» Premium
» Auto Insurance
Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.1

All times are GMT. The time now is 07:06 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2