Originally Posted by
pbonsalb
The N54 requires some maintenance. What has been done? We have had our 08 535xi with N54 for 8 of its 10 years and 100k of its 130k miles. I have de-gooed and de-carboned the intake side of the head, replaced valve cover gasket, oil filter housing and oil cooler gaskets, coils, plugs, vanos solenoids, tightened wastegates, wastegate hoses, cooling system hoses and thermostat and water pump, 02 sensors, diff and trans and brake and front diff and transfer case fluids, front upper and lower control arms, trans pan/filter/mechatronics sleeve, front and rear rotors and pads, one rear wheel bearing, and probably sone other stuff. Turbos doing ok so far. Some oil seepage so they will probably leak more and I will change them within the next few years. 335i with N54 should be similar. Find out what has been done. Then you will know whether the car is worth $5k or $10k or somewhere in between.
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