I've gone with OEM parts.stuartinzg wrote:I should probably start to prepare myself for some of these - being at 35k now.R.E92 wrote:Had my car for nearly 3 years, from 17k to 60k miles and had the following:
Piezo injector failure
Leaking adaptive suspension
HPFP (High pressure fuel pump)
Faulty coil packs
LPFP (low pressure fuel pump)
Rattling wastegate actuators
The HPFP will cause the car to misfire while driving and to crank for long while starting. When it gets more severe will prevent the car starting. A bad HPFP will also mean your engine runs lean which is bad news.
The rattling wastegates are just an annoyance for the most part, all cars over 50k miles will have it to a varying degree, it's hard to hear from the drivers seat unless you part in a garage. They will eventually fail but it takes a good 30k miles before you start to notice a lack of boost and the car throws a fault.
Coil packs can be picked up for £20 each if you shop around. I got a fresh set of 6 for £120 from ECP during their last black friday sale.
Injectors are another thing that will be knackered on most cars if they are revision 11 or lower but are only really obvious once you have them fixed. When they fail the car will need recovering but they can run in a leaky state for years. It's only once you get a new set of injectors that you realise how much smoother and more fuel efficient the car is.
The DCT gearbox has proven to be incredibly reliable all across the BMW range. As with most things in these cars it's been hugely over-engineered, capable of handling much more torque than a standard Z4 can throw at it.
Did you go with OEM injectors or look at aftermarket alternatives like the coils? Same for the HP/LPFP.
What did you do about the wastegates? I had an idea to go hybrid when they need doing and get them re-engineered. What do you think?
The leaking adaptive is a worry as that's bloody expensive and I'm out of warranty.
For coils there are a few different brands of OEM coil. Bosch, Deplhi and Eldor. There's no real evidence to suggest Delphi or Eldor are any better than Bosch and the Bosch coils were £60 cheaper for the lot.
With injectors I'm not aware of any aftermarket solutions. The index 12 seem to be a more robust design as I'm not aware of any failures.
For turbos there are a good few aftermarket options. Mine were replaced under warranty so I just have another OEM set. If you are doing it out of your own pocked then Pure offer some good setups but I think most retain the stock wastegate configuration so may also suffer rattle. If you don't plan on going above 500bhp then stock are all you need.
Leaking dampers are just a fact of life with the adaptive suspension. I've seen lots of people reporting leaks and there is a serious part shortage of them due to that. 2 week lead time from dealers.
