A used Porsche can be one of the best buys in the car world, or one of the most expensive mistakes. The difference usually comes down to one thing: what you knew before you handed over the money. A pre-purchase inspection (PPI) from someone who works on Porsches every day is the cheapest insurance you can buy.
Here’s what we look at when a Porsche comes into our Lexington shop for a PPI, and why each piece matters.
Start with the computer: a full diagnostic scan
A generic code reader only talks to the engine. A modern Porsche has dozens of modules: transmission, PDK, PASM suspension, airbags, climate, and more. We connect with PIWIS, Porsche’s own factory diagnostic tool, and read stored and pending faults in every module.
PIWIS can also show the engine’s over-rev history on many models. Over-revs are usually caused by a missed shift on a manual car, and they can point to hard use a clean exterior won’t reveal. A few low-level entries are common. Entries in the higher ranges deserve a serious conversation with the seller.
Model-specific weak points
Every Porsche generation has its own list of things to check. A general inspection won’t know them. Ours starts there. A few examples:
- 996, 997.1, Boxster and Cayman (M96/M97 engines): the intermediate shaft (IMS) bearing and cylinder bore scoring. We look for the warning signs and ask whether the IMS bearing has already been addressed, and with what.
- Air-oil separator and rear main seal: smoke on startup and oil weeping between the engine and transmission are common on these engines, and worth pricing in.
- Cooling system: radiators in the front corners collect debris, and the plastic coolant pipes on early V8 Cayennes are a known issue.
- PDK and Tiptronic: how the transmission shifts cold and warm, any harsh engagement, and fault history in the transmission module.
Engine and drivetrain
We look for oil and coolant leaks, listen for noises that don’t belong, check engine and transmission mounts, and look at fluid condition. Fresh fluids aren’t a red flag on their own, but fresh fluids with no service records are worth asking about.
Brakes, tires and suspension
Porsche brakes, tires and suspension parts are not cheap, so we note anything that will need attention soon. That includes pad and rotor life (ceramic PCCB rotors get special attention), tire condition and date codes, worn control arms and bushings, and any sign the car has hit something hard.
Body, interior and features
A condition walkaround: paint, panel gaps, glass, signs of previous repair, and a check that the electronics and features work as they should. Convertible tops, sport exhaust, PASM, sport chrono: if it has a button, we press it.
A road test, when the seller allows it
Some things only show up on the road: a clunk over bumps, a vibration at speed, a transmission that hesitates when warm. When the seller permits, we drive the car.
You get a photo report, and a straight answer
Every PPI comes with a digital report with photos and notes, sent straight to you. We also tell you what we’d do in your shoes. Sometimes the answer is “buy it.” Sometimes it’s “buy it, but budget for these items.” And sometimes it’s “keep looking.” All three are good outcomes.
Buying from out of town?
If you’re buying a Porsche in Central Kentucky but live somewhere else, the seller can bring the car to our shop and you get the full photo report wherever you are.
Book a PPI in Lexington
Call us at 859-407-2226 with the year, model and VIN, plus where the car is located. You can also read more about our pre-purchase inspections or see everything we do on our Porsche service page.
