Crazy nice low miles.

The main issues are there is no way to monitor the coolant pump and when it fails it will only alert you by killing engine power as it overheats.

Get bimmerlink or android equivalent and monitor coolant RPM and oil and coolant pressure.

Oil changes at 7500 is a fairly conservative number.

The oil pump is programmed to put out as little pressure as needed and it's the N55s Achilles heel.

I had to replace my motor when the engine seized at just under 200kmi.

That being said the most important thing to prevent oil starvation is when doing any job that interrupted the oil circuit to do a prime of the oil circuit.

I am directly involved with 4 N55s that spun rod bearings with several different causes.

Mine: boost pressure leaked into the crankcase and interrupted the oil rate going through the rod bearings.

Most likely cause: CCV system check valve failed and let full boost at redline into crankcase.

Engine seized in seconds. Autopsy showed several rod shells welded to the crank and no significant wear to the shells with no glitter in the oil.

Wife's N55 rod bearing failed when OFHG blew out, loss of pressure, most likely when she went to overtake a "fossil driver".

Her engine didn't seize: but a couple bearings stuck to the crank and try tore the hell our of the big end of the con rod. That's actually a good thing. There's a chance the crank survived and i can rebuild that motor cost effectively.

So: no way to really avoid one of those random catastrophe but what is very important: don't use start/stop if you car has it, change oil more frequently of you do lots of city driving, gas gets into the oil and ruins it.

Stay on top of oil leaks, and check occasionally if your vacuum tank built into the head cover has failed. OFHG, replace immediately on the first sign of weeping. The usual issue with that is oil leaks down the front and kills the serpentine belt but far riskier is if the seal fails catastrophically like wife's.

I drove my car like a rental and it pulled like hell every demand up to 200 kmi so look forward to a long life.

The only preventive maintenance other than plugs i can think of coming up is intakes valve walnut blast. Recommended every 30-50,000 mi. Usually never done by the first owner.

Unless you know history, replacing the intake air filters and cabin air filters are usually neglected.

Get bimmerlink mentioned above but also bimmercode. You can set a bunch of things right such as keyfob roll up all the windows, disable the every launch alerts on iDrive, set the welcome lights behavior (i set only white lights all corners for example).

My E70 came with the special lighting interior. I think i have like six or eight more lights i hope you have the same it's mind blowing. My PO replaced all the lights with LED inside and out.

My car's hid lights failed within a couple months. Pay attention to the color of the headlights. If you get any off color at all they are worn out. Most people will wait until the lights are 30-40% loss of brightness without knowing it.

It shouldn't apply to you for years but as the n55 ages/wears the factory settings for oil pressure mapping becomes too low and is most likey the lynchpin of the oil starvation that happens almost always.

In mine and wife's cases, 8-10# more oil psi and catastrophic engine failure would have just been a very messy engine oil puke, low oil warning and maybe reduced power.

I'm working on fix for that and will share the exact fix when I have it.

Get/keep great tires: mine are a compromise that are "very ok" but full throttle shifts will break traction on both 1-2 and 2-3 shifts!

The car is great, enjoy the crap out of it. I'm envious about the low miles! Mine had 144kmi when i bought it.

Oh almost forgot:

Never wide open throttle until oil temp is 60-70C (bimmerlink).

When ambient is very cold, drive in Ds until oil temp is up to maybe 30-40 and turn off HVAC until coolant temp is 70 and the car will preheat 3-4x as fast.

Your transmission is too young it shouldn't have this issue but model of xm in E70 has a common issue add it ages, the torque converter won't grab until 1100-1200 RPM. Should this happen just get used to a soft right foot until it grabs and you can launch very very smoothly.

Oh one more thing: i hated the concept of the electric parking brake until i used it to stop the car. It will brake the car faster than most people ever brake. Try it so you understand how the system works.

Let off the throttle and coast at about 25 mph then pull the p brake button.

Other than the surprising g forces, take note that it won't stay on when your release. In other words it works just like foot brake. It only locks of you are stoped when engaged.

Ok that's it for now.


–awr–

Using Tapatalk VIP on iPhone

__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)