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Discussion Starter · #1 ·
Hi,

I recently purchased 4 new tyres for my Z3 Roadster (3.0i) and have recently taken the car in to get the balance checked as I was getting vibration through the steering wheel.

Whilst getting this checked I was told that i have not got the right tyres on as they have the MO symbol for Mercedes on them and not the * for BMW.

I seem to be getting mixed messages on this from BMW, Michelin and a number of tyre fitters some of whom are saying:

This will void my:

BMW/other car Warranty
BMW / Other Car Insurance

Naturally this is worrying me and I wanted to get some advise as I am now keen to change the tyres.

However, if they are fine and there is absolultely no difference in the tyre design (Isfor commissioning purposes only) then I won't worry.

The tyres are:

Michelin Primacy HP
245/40R17 91W
225/45R17 91W

Would appreciate your comments

Thanks

Seashark
 

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Hi Seashark, sorry to hear your troubles mate

I am by no means a tyre expert but I have, like you, went through the process of replacing all 4 corners but I choose to take non Run Flats.

The official BMW tyres defo have star ratings and are the only ones the dealer would fit for me nothing else. At 250 a pop I declined his offer.

I believe it does not invalidate your bmw warranty. A member posted details about such things as how the warranty affected if you change to non bmw tyres (I believe).

Someone will come along and back it up, I wouldn't worry about it. But I wouldn't be happy either.... I take it you went to a non bmw dealer?

Red
 

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The sizes sound correct, just check your hand book to ensure that the sizes are listed as being correct for the type of alloy wheel option you have. The sizes are common sizes for both BMW & Mercedes models that run staggered rear wheels. (A lot of dealers and fitters talk a load of twaddle to sound as they know what they are doing when they are just as confused or do not know an exact answer).

The tyres as you have listed are perfectly suitable and safe for the vehicle. Your warranty and insurance will be fine.

The asterix and MO marking may be specific to some specialised M power and AMG models but this will be news to me as I cannot recall seeing these markings. However in certain sizes, the tyres are listed in our books as specific BMW/Mercedes fitments, where you will only a get a choice of 2 or 3 premium brand options designed spefically for that certain fitment and thats it. (For example on BMW M5's, Mercedes SL55/E55 etc.)


The only ones that are specific and very strict, that we come across several times a day are tyres for Porsches. The are deisgnated with N followed by a number. We will under no circumstances fit anything notspecifically marked for Porsches to a Porsche with this requirement.
 

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I would imagine it will invalidate a portion of your warranty but not all of it. The only way to be sure is to hear it from the horses mouth because if someone tells you yes it's fine then BMW say differently then you don't have a leg to stand on.

Contact BMW customer services, ask them the question and take the full name of the person you speak with, their position and make a record of the time and date of the call. Any information they provide you ask for it to be backed up in writing.

That is the only way to know for sure and to be backed up.

I know Porsche are supposed to only be fitted with N rated tyres (there are even different grades of this rating) and perhaps BMW and other manufacturers have adopted this procedure as a way of generating more revenue???
:thumbsup
 

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Jaguar has done it for a while with Pirelli's too.
They did especially for the P-zero system, using the directional P-zero's on the front and the Assimetrico on the rears). Had this on my XKR,have to admit, on that car this setup worked, but it was hideously expensive as it used to shred the rear's but was also heavy on the fronts!

Not sure of the specific Jag markings though. However I do believe that will only have been introduced oustide Porsche and specialist M/AMg fitment recently.

As the car in question is a Z3 3.0ltr, that will be unaffected by this.
 

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Discussion Starter · #11 ·
Hi thanks for all your comments.

I am going to try BMW again tomorrow as 2 dealerships near me were closed due to the snow!

Fingers X I will get some clarification and as A20 RYM mentioned I am definately going to get details of whoever I speak to and if possible get them to email me too.

Better to be safe than sorry eh!

I didn't get the tyres from the dealership as I got them through a contact of a mechanic mate of mine who will not consider changing them unless there is something in writing.

The main thing for me is that the tyres are right and I am safe. Some have said the tyre mould for Mercedes is harder due to the suspension and the same for BMW cars are softer.

I have noticed a difference to be honest as the previous tyres definately had the * BMW mark on.

I checked the handbook and the sizes are correct and your words of wisdom DSK are reassuring.

Hopefully tomorrow will bring some clarity.

Will keep you posted.

Thanks
 

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Hi thanks for all your comments.

I am going to try BMW again tomorrow as 2 dealerships near me were closed due to the snow!

Fingers X I will get some clarification and as A20 RYM mentioned I am definately going to get details of whoever I speak to and if possible get them to email me too.

Better to be safe than sorry eh!

I didn't get the tyres from the dealership as I got them through a contact of a mechanic mate of mine who will not consider changing them unless there is something in writing.

The main thing for me is that the tyres are right and I am safe. Some have said the tyre mould for Mercedes is harder due to the suspension and the same for BMW cars are softer.

I have noticed a difference to be honest as the previous tyres definately had the * BMW mark on.

I checked the handbook and the sizes are correct and your words of wisdom DSK are reassuring.

Hopefully tomorrow will bring some clarity.

Will keep you posted.

Thanks
It is definitely better to be safe than sorry.

I always cuss my missus when she contacts companies and doesn't get a full name or reference number... Sometimes a name will suffice as many calls are recorded these days but if it's in writing then it's in black and white (hard evidence):thumbsup

Please keep us posted as this will help us all when giving out advice in the future:thumbsup
 
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