I am really curious if I have a 50/50 chance or better at getting an 04 with the YO YO. I am considering not reordering a MINI because of this and my local dealers service.

 

'04 MCS (9/2003 build date) 6,800+ miles and ZERO yo-yo.

 

170 miles on my new 04 MCS, haven't noticed anything out of the ordinary.

 

my guess would be 3-5%

my 2004 MCS has no noticable Yo-Yo.

 

1.000 miles on '04 MCS...no YO-YO

 

1,200 miles on 12/03 build- nothing

 

1/04 build MCS, 925 mi on it today.... felt a slight yoyo in the 1-300 mi range, but havent detected it since 300 mi....

 

Okay; my '04 MCS (Sept. build v36 SW) exhibited the yo-yo less than a mile after I pulled off the dealer's lot the day of delivery and has exhibited this behavior on a periodic basis every since. Is it an annoying problem; absolutely. Have I ever reconsidered my decision to make the purchase due to this issue; no way! Would I buy the car again; you bet. I've owned many different sports cars and sports sedans over the years and driven many more; on a smiles per mile basis you simply cannot beat the MCS. Fear not; go for it!

Even IF, and this is a big if, BMW does not resolve this aparent design flaw at some point in the future it certainly doesn't present enough of a fault to reconsider purchase IMHO.

 

I have noticed since my MINI S was brand new that it hesitates a little on and off between 1,000 and 3,000 RPM. It is faint but very prominant and very noticible. Is this the yo-yo? I have 850 miles on the car now. What should I do?

 

My 12/03 built car had it until I had V37 loaded. That was about 400 miles ago, though it may be coming back. I'm not sure yet.

 

What should you do? Drive it and enjoy it!

 

My biggest fear is that the Yo-Yo turns into something else AFTER the warranty period. My previous experience with BMW was not a good one. My 325 had transmission issues from day one that BMW claimed the operation of the transmission was a "characteristic of the car" (how original). When I took it for service several times they told me that there was nothing wrong - a figment of my imagination - that is the way the transmission operates, etc. 1,500 miles after the warranty expired the transmission completely gave out. $3,500 later the problem was "fixed." I swore I would never own another BMW product. Then the MINI came out. Even though I have been a classic Mini owner forever and absolutely love everything about the new MINI except the owners of the company, it has taken me years to make the decision to buy one. I love it but this "characteristic of the car" rhetoric is absolute BS.

 

I doubt it will develop into anything that serious. If you read the Yo-Yo Chronicles thread you can find out how to modify your bypass valve to eliminate the yo-yo. It appears to be the fault of poor engine management engineering as opposed to a critical engine problem. BMW motorcycles have had a similar problem for years but guys have put tons of miles on those bikes without any related critical failures.

 

2300 miles, and I think I've felt it a little while decelerating to a stop before the clutch is pushed in. I'm not worried about it.
The only thing I can complain about is my 1st to 2nd gear shift. When I redline in first and shift quickly into second and let out the clutch, the car occasionally bogs for 1 to 3 seconds before accelerating again. I dunno what the heck it is!!!

 

I'd guess that a significant yo-yo might occur in less than 10% of new MCS but alot of it has to do with how you drive it. If you go and drive hard and get past 3000 rpm and don't coast much you will hardly notice much that resembles the yo-yo but if you take your time accelerating and often coast in 2nd and 3rd gear around 2000 to 3000 rpm then you might get some jerkiness and hesitation.

Some owners say that there was no yo-yo when the MINI was bought but that it occured later. Some say it was there from the start. There are some MCS that definitely have no yo-yo. Take your pick. Doesn't it seem like a used MINI would be the best insurance against the yo-yo?

 

700 miles with no yo-yo

 

1200 Miles with my 2004 MCS 3/04 Build. NO YO YO! The engine is very smooth throughout the rev range.

 

10/04 Build 10,560 miles .......no yo-yo. If you ever find a vehicle that has no problems let me know, I will be first in line to buy it!Last time I checked all brands have a service dept. which would lead me to believe they will at some point have some type of issues.

 

>>10/04 Build 10,560 miles .......no yo-yo. If you ever find a vehicle that has no problems let me know, I will be first in line to buy it!Last time I checked all brands have a service dept. which would lead me to believe they will at some point have some type of issues.

10/04 ??

 

>>>>10/04 Build 10,560 miles .......no yo-yo. If you ever find a vehicle that has no problems let me know, I will be first in line to buy it!Last time I checked all brands have a service dept. which would lead me to believe they will at some point have some type of issues.
>>
>>10/04 ??

It is quite strange that this guys car was built in the future.

 

10/03 Build with just over 11k miles. No YO-YO, no stumble. Runs smoooooth.
Jim Williams

 

9/03 built with yo-yo. I can reproduce it almost every time going up the same hill near my house. However as I put more miles on it, the severity of the yo-yo has reduced. Maybe it has to do with the gas/temperature.

In my car, the condition that causes yo-yo is very specific. You have to accelerate fairly hard (much harder than normal driving), and put a heavy load on the car (climb a hill, accelerate onto the freeway, etc). Depending on your local roads, it is entirely possible that you may never notice it.

I wouldn't worry too much about the yo-yo if I were you.

 

2000 miles and so far not a hint of it. Starts right up hot or cold and drives off without a hic-up or stumble. I love it!.......................mgg

 

9/03 build, no yo-yo after 6500 miles. I read somewhere (maybe the yo-yo chronicles...) that all MCS's have the yo-yo, it's just more pronounced for some people -- may be true, but it wouldn't effect my recommendation to someone to buy one. It's got to be some bad mojo combination of car, driver, weather and road.

I came to the MCS from a '74 Alfa GTV. I was just so happy to have a car that would start every time. Because of of my experience with that car, I tend shift in the 4500 range and not let revs drop below 3000. (It taught me how to master the heal-toe method and to constantly rev the engine at stops. I don't know how many times I'd be sitting at a red light reving my engine just to keep the car running and when the light turned green, some kid in an Acura or Honda would leave me in a cloud of tire smoke while I'm obvliously watching my dials so be sure I don't have a charging problem...)

If you are really concerned about it, I'd say to make a check list of what people are saying are the conditions they use to reproduce it: heavy load, uphill, steady revs; standard load, flat, let clutch out at low revs, steady increase, etc. Maybe someone has already created this list. Take it with you to the dealer and test the car before you sign on the dotted line. :smile:

 

The who Yo-Yo thing confuses me. If it's something that Ryphile actually fixed by physically doing something in the engine, shouldn't EVERY car have the Yo-Yo?

It's not like one MCS is gonna have a different spring stiffness in the bypass valve than another MCS