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Messages - X5Sport

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General X5 Forum (E70) / Re: Tyre question
« on: Today at 08:02:37 PM »
If both are ‘*’ rated then unlikely to be an issue., especially if tread depths were close anyway.

@Huxsta, I’m still trying to work that one out but I think it’s do do with the xDrive system and how each diff sends the extra turns back into the system (they have to be lost somewhere) and what the transfer box is doing with the extra loading.

General X5 Forum (E70) / Re: Tyre question
« on: Today at 04:56:54 PM »
Bridgestone Dueller are one of the standard fit whether RFT or not.  I don’t expect the RAC will care (but they might).  As long as they are ‘*’ marked then your transmission will still be friends with you  :D

I think most of us on here feel that this issue should not exist with modern cars, and allegedly with the F15 series it has been largely overcome with the new transfer box in use. 

No owner should have to play Russian Roulette with choice of tyres  >:(

General X5 Forum (E70) / Re: Tyre question
« on: Today at 02:46:19 PM »
In simple terms, it is because (in their opinion) it’s up to you not them to know what should be on your car.  They also won’t know if you have staggered on non-staggered.  I doubt very much if they even understand the critical connections with all of the different transmission issues  They won’t care what you fit and can’t be held accountable if you order the wrong thing.  They will simply point you at whatever the Owner’s Manual, or car manufacturer says.

Their shop systems use a very simple search engine that looks at sizes and weight ratings based on a look-up table.  Anything more is highly complex and needs careful rules written into the software database.  That costs them money to produce and maintain.  If they get that wrong then they could be in trouble so they don’t and somewhere in their Ts & Cs will be a get out of jail clause absolving them of anything and everything.

BMW themselves only ‘recommend’ but won’t help if you choose to use anything else, and will walk away if a warranty claim occurs.  A BMW dealer will only sell you the right rubber for the car, but at a really silly price that unless someone else is paying, you won’t want to pay.

Problems / Re: A/C
« on: Today at 02:36:45 PM »
How big are the ‘wallet moths’ then..... :P

General X5 Forum (E70) / Re: Tyre question
« on: Today at 10:13:50 AM »
The simplest answer is that if is doesn’t have a ‘*’ on the sidewall then the tyre does not meet the rolling radius spec that BMW need.

Does it matter?

In reality yes it needs thinking about.  Because the front and rear tyres are a different size, their rolling radii are different.  BMW (and other AWD manufacturers) have a tyre size spec that ensures the rolling radii are matched correctly.  These tyres (on a BMW) have a ‘*’ on the sidewall.

Having unmatched rolling radii increases the chances of transmission wind up, and can (and has) lead to shattered diffs or transfer boxes.  These are not covered by BMW AUC or new car warranties.

You don’t have to have RFT, but you really should have matched tyres on all corners with tread depth relatively evenly matched all round.

This unfortunately means premium tyres and usually having them changed as a set, especially if the old tyres on the car are more than 1.5-2mm lower in tread depth.

Other manufacturers with similar issues are Porsche, Audi and Mercedes.

The warning signs are odd grumbling noises from the transmission and low speed jerkiness at full lock.  Both are indications that the transmission is under excess load and could result in failure.  It doesn’t always happen, but more than a few have happened on here.

Buy and sell / Re: Wanted : white e70 40d
« on: Today at 09:33:13 AM »
Could be the comfort package, or just comfort seats (which in my opinion are a must due to the range of adjustments).  When I order my X6 there was no ‘comfort package’ and the seats were an option.

New BMW cars get it free for 3 years, then you pay......

My new F46 gets a free update 4 times a year via the built in telematics system.  No need to download anything  :D

We've only just had super fast broadband turned on here (over a year late!).  My Škoda had two 26GB updates per year which took 16 hours to download (~7Mbps) so I’m betting that at ~80Mbps it should be a little quicker!

Anyone know what the current cost for OEM updates is after the free period expires?

General X5 Forum (E70) / Re: X5 tax help
« on: Yesterday at 01:46:12 PM »
Sounds right.  It’s what I did when ordering my X6.

It was your heart typing X5M, and your head missed out on the absent space between X5 and M  >:D

You know you really want a V8 twin turbo   O:-)

Newbies section / Re: Newbie in the need of a e70
« on: Yesterday at 01:43:12 PM »
Hello and :hi:......and congrats too.

Kids have a way of doing that. :o

We ran a Škoda Superb Estate (replacing a Mini Countryman) for the first few years and have now gone to a 220dX Gran Tourer as we don’t need to carry quite so much stuff!

Have a look here.....

Newtis dot info

Copy of the dealer manuals and not that old looking at all of the models covered.

General X5 Forum (E53) / Re: e53 car key reprogramming
« on: Yesterday at 01:37:11 PM »
Probably at least every few months.  We use both keys on ours depending upon who is driving as we have all of the key memory functions set up.  If only one driver then probably worth alternating monthly perhaps?  The key batteries are ageing now so they don’t hold a charge as well as they used to.

That being said, we had a car in storage for 18 months and the keys still worked fine.

General X5 Forum (E53) / Re: tyres
« on: Yesterday at 08:21:30 AM »
To reduce the risk of transmission failure you would be better off fitting tyres with the ‘*’ mark in the sidewall.  It means they are made to BMW spec in terms of matched rolling radii.  This is key for cars with ‘staggered setups’  (different sizes front and rear), and avoids transmission wind up.  Worst case is shattered diffs and transfer boxes.

There is a long thread in here to help you decide......

Unfortunately it means premium brands and the price that goes with that.

Newbies section / Re: New E70 owner
« on: Yesterday at 08:18:55 AM »
Hello and :hi:

Problems / Re: Hesitation to complete loss of drive!
« on: August 18, 2018, 03:20:02 PM »
It depends upon how big the difference is, but normally only becomes an issue with a brand new pair on one axle and almost completely worn out pair on the other.

There have been one or two on here that have just failed for no obvious reason - not that that helps much though  :(

BMW xDrive transmissions don’t always seem to be made with the best materials chosen!  Fingers crossed it’s less serious  :)

Problems / Re: Hesitation to complete loss of drive!
« on: August 18, 2018, 11:37:40 AM »
Oh dear.  kkx5 is our on Forum specialist who may be able to point you in the right direction and he is ‘in the industry’ but I don’t know where his workshop is based.

Just out of interest, what tyres are fitted?

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