Saab Sonett Buying Guide

The road-going Saab Sonett came in two forms. Confirm the offered Saab Sonett matches its paperwork, then book an inspection that covers its construction and fitted equipment.

I used the Hagerty UK Saab Sonett III history and the Hagerty UK Saab Sonett II history when preparing this November 7, 2026 guide. Those sources describe the model and its known weak spots, not every surviving chassis. So, the checks below turn that background into questions for a seller and a workshop; they do not assign a failure rate or current market value.

Confirm Sonett II, Sonett II V4 or Sonett III

The road-going Saab Sonett came in two forms. Hagerty says the Sonett II was shown in 1966 and the first 258 production cars used a 60 bhp two-stroke three-cylinder engine, before Saab switched to the 1.5-litre Ford V4. The Sonett III followed in 1970 with a Coggiola-styled body on the same centre section and ran until 1974, with 8368 made. The original Sonett I of the 1950s was a prototype run of six cars. Ask for the chassis number and records and have a Saab specialist confirm which car this is. A two-stroke Sonett II is far rarer than a V4.

Check the V4 and its emissions changes

Hagerty says the Sonett III engine grew from 1498 cc to 1698 cc for 1971 but kept 65 bhp because Saab lowered the compression ratio for US emissions rules. Ask which engine is fitted now and whether it is original. Have the mechanic check a cold start, oil pressure, cooling and leaks. Ford and Saab V4 parts are shared with the Saab 96, which helps. On a Sonett II V4, Hagerty notes the engine added nose weight and needed a bonnet bulge, so a missing bulge suggests changes.

Inspect the body and the hand-operated lights

The Sonett II and III used a glassfibre body over a steel structure. Ask the inspector to examine the steel box-frame structure for corrosion with the car lifted, and the body for cracks and repairs. On a Sonett III, Hagerty says the retractable headlights are raised by hand rather than electrically, so test the mechanism several times. Check the opening rear window and the seals. Hagerty says impact-absorbing front and rear ends arrived for 1973, so ask whether this car has the parts that match its year. Request photographs from any restoration.

Check the import file and the trim

Hagerty says the Sonett was designed for American buyers and was never officially exported to the UK. So most cars outside the US are imports, and the paperwork matters. Ask for the US title, export and import records and match the chassis number to each. The Sonett III came in standard form with steel wheels and brown corduroy trim, or luxury form with alloys and leather. Ask which this car was and whether the trim is original. Hagerty notes the alloy wheel design changed for 1971, which helps date the car.

Put the identity and import file beside the inspection

The physical chassis identifier must agree with the sale documents before a report is ordered. Use our VIN identity checks to organise that comparison and our imported-car report guide to understand why foreign history may be thin. Ask for original registration, import and ownership papers as applicable. NMVTIS offers a U.S. title-history route with defined coverage; it does not certify a bespoke build or replace foreign records. A fake PDF can disguise an ownership gap, so verify evidence through the issuing source rather than accepting a seller screenshot.

Agree the specialist work before leaving a deposit

Tell the shop which version and components it will see, then agree lift access, a controlled road test and a written description of limitations. Our pre-purchase inspection checklist helps frame the appointment, while NYC used-car guidance recommends an independent mechanic. Ask the specialist to separate immediate safety work from cosmetic preferences and optional upgrades. Look, a repair estimate is useful only if a supplier will actually provide the required part. Have the shop obtain a response for any known missing item.

Keep the offer conditional on the findings you care about. Put any seller repair promise in the purchase agreement. If the workshop cannot establish structural condition or a route to a needed safety part, defer the deal rather than inventing a discount. The final decision should reflect the documented car and your intended use, not a figure copied from a launch story.

Write down what the viewing showed

Keep a dated note of what you saw on the Saab Sonett: chassis identifiers, warning lights, fluid leaks under the car, tyre dates, panel gaps and any part the seller could not show. Photograph each item. Send that list to the specialist before the appointment so the inspection starts from facts, not from the advert. If the seller will not allow photographs or lift access, ask why before you go further. A rare car rewards slow, written checks more than a quick decision made because another buyer might appear. If the seller pushes for a quick deposit, offer a refundable one tied to the inspection date, and put that condition in writing before any money moves.

We are a licensed CARFAX and AutoCheck reseller, not affiliated with CARFAX, AutoCheck or Experian. Wholesale reports cost a few dollars; confirm current coverage and the total at checkout. A quiet report can miss unreported repairs. Keep the independent inspection even if the seller sends an impressive PDF.

Sources

• the Hagerty UK Saab Sonett III history
• the Hagerty UK Saab Sonett II history
• U.S. DOJ NMVTIS
• NYC used-car buying guidance