Buy a Lamborghini Islero on Polo Storico paperwork and honest panel fit first. Marazzi build quality was uneven when new, so perfect gaps usually mean a restoration, and a fake S badge is an expensive story.
For this November 5, 2026 guide I read Car Collector International: Lamborghini Islero guide and Hemmings: The Forgotten Bull Islero buyer's guide. The mechanical cautions below come from those pages; the order of checks and the questions for the seller are my own practical recommendations. Any price figures in those sources are market snapshots, not a valuation of the car in front of you. So, compare it with recent sales of the same specification and condition. I also kept the advice to things you can see, hear or ask for on a viewing day.
Confirm GT versus S with the factory book
Car Collector International says S cars are visibly and mechanically distinct, with bonnet vents, revised suspension and interior changes, and that an S badge on a base car is a known trap. Hemmings lists about 125 Isleros and 100 S cars. Check the build book before any premium.
Judge panel fit with a restorer's eye
Hemmings quotes Rick Cousineau that good fit-and-finish usually means the car has been redone, because Marazzi cars left the works with uneven gaps. Car Collector International wants a lift inspection and paint-depth gauge on restored cars. Ask for restoration photos.
Hunt rust in sills, floors and rear glass surrounds
Car Collector International lists those rust zones on Marazzi steel bodies. Get underneath. Fresh underseal without photos is a soft signal.
Listen for second-gear synchro trouble
Hemmings says these gearboxes often struggle on the 2nd-gear downshift while upshifts feel better, and that a rebuild can run about $6,000. Try every gear hot and cold.
Watch the alternator light at idle
Hemmings notes weak alternators that light the warning lamp at idle but clear above about 1,000 rpm. Note what the lamp does after a hot restart. Our cold-start test guide helps you plan that first start.
Ask about engine work and carb sync
Car Collector International wants carburettor sync, cold-start behaviour, hot oil pressure and belt or chain history. Hemmings puts a standard rebuild around $35,000 and warns about careless prior work. Invoices matter more than stories.
Expect parts to be scarce
Hemmings quotes restorer Rick Cousineau on glass, trim and body parts that are nearly impossible to find for a 225-car run. Car Collector International also treats Polo Storico paperwork as the strongest paper. A complete, sorted car is usually cheaper than a project that needs rare glass.
Prove the identity before a deposit
Match the chassis number on the Islero to the title, any import papers and the plate on the car before you order a history report. Our VIN verification guide walks through that match, and imported-car report coverage sets expectations for cars that spent years overseas. Older chassis numbers may sit outside modern report databases, so confirm coverage before paying. NMVTIS covers U.S. title history only; it cannot replace foreign records or a physical inspection.
Get the repair scope in writing first
If the identity or the structure looks soft, get a Lamborghini specialist's written estimate before you go further. Look, a seller PDF or a folder of photos is a starting document, not independent proof of condition. Ask the inspector for written findings with local estimates, split into safety work and cosmetic wishes. The NYC consumer-agency used-car guidance tells buyers to have an independent mechanic check the car, and our pre-purchase inspection checklist helps you set the scope. Keep a dated note of the drive, the temperatures and any noises, because a seller who disputes your findings later will ask what you saw and when.
We are a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck or Experian. Guest reports have been about $5.50, member reports about $4.50 and a two-report bundle about $6.75; confirm the price at checkout because it can change. A report can miss unreported work, so keep the inspection appointment even when the history looks quiet.
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