08-13-2019, 11:09 PM | #1 |
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Launch control broke tab and rear right drive shaft
Hello, I have a x3m40i, in posting here since there's more 340i than x3.
I got new tires, Michelin 4s and now when I launch my car around 3000rpm, I get zero wheel spin. After a few launches, I heard a clunk noise and then found out that I had a broken left rear suspension tab and the rear right drive shaft was torn. Anyone ever break any parts by using launch control on a modded or stock car? Should this be covered under warranty? I run 265 in the rear and 255 in front. |
08-14-2019, 06:37 AM | #2 |
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On a stock car, yes.
But the tune and wider/stickier tires can technically void the warranty on drivetrain stuff. You're putting more wear on the transmission, axles, etc. By mounting wider and stickier tires. Sometimes wheel spin is protecting your car even if the performance suffers a bit. If you have a good relationship with your dealer, then they may cover it. |
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08-14-2019, 09:23 AM | #4 |
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08-14-2019, 11:28 AM | #5 |
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Sorry to hear.
What tune you running? Now I'm a bit worried to launch my car since I have the same car and am tuned.
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08-15-2019, 08:26 AM | #7 |
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08-15-2019, 08:50 AM | #8 | |
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Launch control is hard on any vehicle just FYI. |
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08-15-2019, 08:56 AM | #9 | ||
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08-15-2019, 09:36 AM | #10 |
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The tune is certainly calling for more TQ than the stock tune and bigger tires are just moving the forces from tire slipage to axels and suspension components. The dealer will surely check for computer tampering just as a matter of bringing it in for service. I had a battery die in my combox and they reflashed my DME because it was running an unauthorized image. I didn't dream in a million years they would that for a COMBOX error but they did. I had to pay to get it reflashed (pre bootmod3 years)
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08-20-2019, 11:26 AM | #11 | |
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Any update on this? Also my car never goes above 2600-2700 ever with or without tune, sounds like the tune is exceeding acceptable load levels at launch
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08-20-2019, 10:23 PM | #13 |
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08-21-2019, 06:54 AM | #14 | |
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BMWs are becoming very fragile and that's an X car which should have beefier drivetrain components.
Porsche launch control launches at 5000 rpm with no problems. Definitely more grip put more stress on the drivetrain but it should be able to launch without damage. As for tyres it's no problem X3 come with optional 275 at the back OEM. If you are not tuned definitely go give it a try sometimes it works though they will tell you the user manual says using launch control could damage the drivetrain. As for warranty it depends how many times you used launch control. Quote:
Last edited by IMS-340C; 08-21-2019 at 07:17 AM.. |
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08-21-2019, 10:12 PM | #16 | |
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It is, after all, an X3 M40i - not an M car. |
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08-22-2019, 04:49 AM | #17 |
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I am not comparing them in terms of performance or cornering ability, I am comparing them in terms of build quality.
Sports car are more fragile than normal cars so definitely the X3 should be more reliable than a Porsche. Also this is an X car is built tougher even with some off-road abilities and with all wheel drive their drive shafts should handle a lot of stress. |
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08-25-2019, 04:09 PM | #18 | ||
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08-26-2019, 05:59 AM | #19 |
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08-26-2019, 03:03 PM | #21 | |
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Did you ever get to the track?
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