Pre-purchase walkaround
2003 Porsche 911 (996)
20,000 miles · asking $69,000
Five-year cost to own, maintenance and fuel
~$4,800
The first water-cooled 911, cheap to buy but not cheap to keep. Money goes into the engine's known weak points and preventive maintenance rather than trim or cosmetics.
The roadmap
20k → 80k mi · 12k a yearYear 1Brakes and consumables.~$481
Year 2The ordinary rhythm: scheduled work and fuel.~$666
Yrs 3-5Tires and the ordinary rhythm. · Brakes and consumables.~$3,655
Five years, all in~$4,800
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 20,000 miles.
Rear main seal leak$330-$1,510 if not done
0typical window 40k-150k · this car: 20k, ahead of it150k mi
The RMS on M96 engines is a chronic weep point. Common enough that a small leak is expected; a heavy one means transmission-out labor. Oil seeping at the bellhousing, drips on the garage floor behind the engine.
Cylinder bore scoring$3,020-$9,970 if not done
0typical window 60k-150k · this car: 20k, ahead of it150k mi
M96 blocks can score on the cylinder walls, often the number 6 cylinder. Leads to major consumption and eventual rebuild. Ticking or knocking at idle, smoke on startup, oil consumption.
Cabriolet top mechanism faultspriced only if found
Condition-driven, not mileage-driven, so it is not in the totals and inspection is the only answer. Top stops mid-cycle, transmission tube seizes, microswitch errors.
windows from 10 owner complaints on file with NHTSA and community service data · · profile researched with cited sources, review pending
0 recalls + 350 service bulletins + 1 investigation →
Federal defect investigations
Rapid coolant loss · PE13009
Service bulletins by area
UNKNOWN OR OTHER (84) · EQUIPMENT (73) · ELECTRICAL SYSTEM (64) · ENGINE (44)
Hand this to your inspector
A $300 inspection against this list is the best money in the whole deal.
01Cut open the oil filter and inspect for metallic (ferrous) debris indicating IMS or bore wear
02Cold-start the engine and listen for ticking, knocking, or startup smoke from bore scoring
03Check the bellhousing seam and rear of the engine for RMS oil seepage
04Inspect the coolant expansion tank and plastic pipe fittings for cracks and residue
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 →