Pre-purchase walkaround
2017 BMW 340i (F30)
60,000 miles
Five-year cost to own, maintenance and fuel
~$17,700
The 340i is the last of the F30 3 Series with a proper straight-six, and the B58 is a genuinely strong engine that mostly avoids the older N55's headaches. Ownership money goes into the usual German maintenance items (cooling, gaskets, brakes, electronics) plus the reality that anything neglected or modified gets expensive fast.
The roadmap
60k → 120k mi · 12k a yearYear 1The ordinary rhythm: scheduled work and fuel.~$3,154
Year 2The ordinary rhythm: scheduled work and fuel.~$3,339
Yrs 3-5Suspension comes around again. · Brakes and consumables.~$11,212
Five years, all in~$17,700
typical parts + government labor rates (national labor rates) · an estimate, not a quote
What to look for on this one
Every used example of this chassis has the same questions. The bands show when each tends to surface; the gold line is this car at 60,000 miles.
Oil filter housing gasket leak$330-$1,510 if not done
0typical window 50k-100k · this car: 60k, inside the window150k mi
The gasket between the oil filter housing and block hardens and leaks with heat cycles, a very common B58 and BMW inline-six issue. Oil seepage down the front of the block, burning smell, sometimes oil in the coolant or vice versa.
Cooling system component failure$550-$1,600 if not done
0typical window 60k-100k · this car: 60k, inside the window150k mi
BMW electric water pumps and plastic coolant components are known wear items across this era and degrade with age regardless of miles. Overheating, coolant loss, or warnings; failed electric water pump or plastic thermostat housing.
Aftermarket tune / abusepriced only if found
Condition-driven, not mileage-driven, so it is not in the totals and inspection is the only answer. Suspiciously strong pull, aftermarket downpipe, or flash counter increments in the DME.
windows from 5 owner complaints on file with NHTSA and community service data · · profile researched with cited sources, review pending
0 recalls + 299 service bulletins + 1 investigation →
Federal defect investigations
Desiccated Air Bag Inflator Rupture · EA21002 · OPEN
Service bulletins by area
EQUIPMENT (101) · ELECTRICAL SYSTEM (98) · ENGINE AND ENGINE COOLING (46) · EQUIPMENT ADAPTIVE/MOBILITY (26)
Hand this to your inspector
A $300 inspection against this list is the best money in the whole deal.
01Inspect the oil filter housing area and front of the block for oil seepage and dried residue
02Pressure test or inspect the cooling system, check water pump age and coolant condition
03Pull the oil cap and check for coolant/oil emulsion and inspect valve cover edges for weeping
04Have a shop read the DME for flash counter and check for evidence of a tune or deleted downpipe
Walking into a negotiation?
This roadmap as a PDF, priced for your zip code, with the inspection checklist, a fair price for this example, and the negotiation sheet. Saved to your garage the moment you pay.
$29
saved to your garage
Just keeping tabs? , no account needed.
typical parts + government labor rates · an estimate, not a quotecheck another car →