Porsche Boxster 987 Buying Guide: IMS, Bore Score and Roof

Buy a Porsche Boxster 987 on a fat service file and a quiet, dry mid-engine bay first. Early 987.1 cars carry IMS and bore-score questions that later 987.2 direct-injection cars largely dodge, and a pretty roof with blocked drains still soaks the electrics.

For this November 5, 2026 guide I read Goodwood Insurance: Porsche Boxster 987 buyer's guide and Car Collector International: Porsche Boxster 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.

Know 987.1 versus 987.2 before you travel

Goodwood dates the 987 from 2004 to 2012 and splits 987.1 from the 2009-on 987.2 with revised engines and PDK. Car Collector International also flags M96/M97 IMS exposure on earlier water-cooled cars versus re-engineered 9A1 hardware later. Badge first, then the invoices.

Ask about IMS, RMS and bore score out loud

Goodwood lists IMS bearing worry on early cars, rear main seal leaks and bore scoring especially on 3.4-litre engines. Car Collector International wants documented IMS work where relevant. Unusual tickover noise, oil use or sooty tips belong on the notepad.

Check front radiators and air-conditioning condensers

Goodwood warns those coolers sit low in the front apron where leaf mulch and stone chips cause corrosion and expensive air-con failures. Look for debris and ask whether the air-con actually cools on a longer drive.

Cycle the roof and clear the drains

Goodwood wants the roof operated several times and drains checked for blockages that feed damp carpets and electrical faults. Water behind the seats is a stop sign until someone diagnoses it.

Feel the manual, Tiptronic or PDK carefully

Goodwood prefers manuals for involvement, calls Tiptronic the soft setup for many buyers and rates later PDK as the better two-pedal choice. Try every gear hot and cold.

Plan a cold start and a heat-soaked restart

Both guides want cars that are used, not museum pieces. Our cold-start test guide helps you brief the first start, and a hot restart shows heat soak the driveway loop misses.

Prefer documented 987.2 hardware when the budget allows

Goodwood and Car Collector International both treat post-2009 direct-injection cars as the cleaner mechanical story. PDK is fine if you want two pedals; Tiptronic is the soft configuration for many buyers.

Prove the identity before a deposit

Match the chassis number on the 987 Boxster 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 service story or the mid-engine leaks look soft, get a Porsche specialist's written estimate before you commit. 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.

Sources

• Goodwood Insurance: Porsche Boxster 987 buyer's guide
• Car Collector International: Porsche Boxster guide
• U.S. Department of Justice: NMVTIS
• NYC DCWP: used-car buying tips