New XC40 sudden power loss - safety issue
Hi
Are you sure about rejecting the car after 5 weeks? I understand that you can reject a car within 30 days , after this and for up to 6 months you can reject a car but you have to prove to the dealer that a fault (s) existed when the car was purchased/ taken delivery of the vehicle.
Are you sure about rejecting the car after 5 weeks? I understand that you can reject a car within 30 days , after this and for up to 6 months you can reject a car but you have to prove to the dealer that a fault (s) existed when the car was purchased/ taken delivery of the vehicle.
T4 recharge, plus spec, 23my
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Thanks for your input. You are certainly right about the 'don't trust it' advice. While we are having ongoing discussions with the dealer and Volvo UK we thought it prudent to see what others think and we thought this forum was the right place for alternative viewpoints.
We came on to this forum as we noted that others do share problems and we feel that when you are taking on the might of a large organisation it's quite important to gain the backing of others when down in the trenches - thanks for your support.
We came on to this forum as we noted that others do share problems and we feel that when you are taking on the might of a large organisation it's quite important to gain the backing of others when down in the trenches - thanks for your support.
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Many thanks for your clear advice. For info - we rejected the car within the first 30 days, but we are experiencing great difficulty in getting them to accept that we simply do not want it back .
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Sincere apologies - hope that slip does not damage our credibility - we will put it down to reams of correspondence with Volvo - we got the car on 20 November, and it was registered to us on 24 November, the incident occurred on 17 December and we contacted Volvo to advise them of our dissatisfaction on 18 December, and then formally rejected the car on 20 December - all within the 30 days.
Apologies for the confusion.
Apologies for the confusion.
Sounds more like a loose battery lead than anything really.berryberry wrote: ↑Wed Jan 01, 2025 3:00 pm
Hi Neil
The situation that night was that we broke and slowed down to stop at the junction, and the stop/start engaged. We then when it was safe to do so, accelerated, and all was well and the car moved forward 10ft, it then died! Complete loss of all power, lights, the lot. With hazard lights deployed and with seconds to get out of the car, we pressed the starter,the car started and we drove off. The key here is that the stop / start appeared to be working fine as we broke at the junction and then accelerated, it was the involuntary stop that gave us serious safety concerns.
NB your car doesn't have stop/start as such, it's a mild hybrid - the engine can and will shut down at any speed as well as at rest, but everything else works normally when that happens as unlike a standard stop/start system, your lights, brake servo, power steering and so on are powered by the 48v battery in the spare wheel well in the boot which holds more than enough charge the for car to travel at speed for several miles (downhill on a motorway for example) with the engine off and the gearbox in neutral.
For the car to die totally, it's a major electrical issue OR a loose 12v battery lead, either way it's something the dealer should be looking into and not (like many do) fobbing you off with "we can't replicate the fault, customer to monitor".
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Wow
That's an entirely different angle that has not really come up at all but very much appreciated just the same.
Not technically gifted enough to have appreciated how a car can keep moving despite the engine shutting down, even at speed. Of course, in our scenario our car came to an immediate cessation of all power so quite surprised that given your theories, the garage, despite our request that they check all things mechanical and computerised, did not even mention either of your possible reasons.
Disappointing to hear that 'many' dealerships do resort to the fob-off approach.
Thanks for the alternative theories.
That's an entirely different angle that has not really come up at all but very much appreciated just the same.
Not technically gifted enough to have appreciated how a car can keep moving despite the engine shutting down, even at speed. Of course, in our scenario our car came to an immediate cessation of all power so quite surprised that given your theories, the garage, despite our request that they check all things mechanical and computerised, did not even mention either of your possible reasons.
Disappointing to hear that 'many' dealerships do resort to the fob-off approach.
Thanks for the alternative theories.
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- Joined: Mon Dec 30, 2024 7:04 pm
Hi Neil
This theory of yours is gaining some considerable traction in our minds, as we researched further and got an answer to suggest that when power transfers from the 12v to the 48v battery, when we would have been nearing the junction for example, it can be that the 48v battery is responsible for providing the initial inertia to take off again, which it did, but then potentially spectacularly failed to transfer back to the 12v operation to proceed further as normal, hence the collapse.
This all seems quite plausible but we may (learning as we go here) be way off the mark. It does appear though that this appears to have happened to others in the past.
Any further thoughts welcomed.
This theory of yours is gaining some considerable traction in our minds, as we researched further and got an answer to suggest that when power transfers from the 12v to the 48v battery, when we would have been nearing the junction for example, it can be that the 48v battery is responsible for providing the initial inertia to take off again, which it did, but then potentially spectacularly failed to transfer back to the 12v operation to proceed further as normal, hence the collapse.
This all seems quite plausible but we may (learning as we go here) be way off the mark. It does appear though that this appears to have happened to others in the past.
Any further thoughts welcomed.