Pre-purchase walkaround
2017 BMW 340i (F30)
60,000 miles
Budget this to put it right, likely due now
~$2,800
Then about $3,600 a year to keep it on the road. Five-year cost to own: ~$20,700.
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 yearNowElectrical and iDrive gremlins · Intake valve carbon buildup · Cooling system component failure · Oil filter housing gasket leak~$2,800
Year 1The catch-up year: everything above, plus the ordinary rhythm.~$5,917
Year 2The ordinary rhythm: scheduled work and fuel.~$3,386
Yrs 3-5Suspension comes around again. · Brakes and consumables.~$11,374
Five years, all in~$20,700
Seller says some of this is done? Paste the service records and documented work is credited out of the total.
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$360-$1,180 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$480-$1,230 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 0 owner complaints on file with NHTSA and community service data ·
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.
This walkaround found ~$2,764 of work the records do not cover. If the sheet wins you even 1% of that at the table, the packet paid for itself 1x over.
$29
saved to your garage
Just keeping tabs? , no account needed.
typical parts + government labor rates · an estimate, not a quoteselling this car? build the record →