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Get a used Porsche Boxster inspected: on-site used-car inspection, from €289

A Porsche Boxster 986 with 70,000 km and a well-kept interior can be carrying a ticking problem in the flat-six engine: a worn IMS bearing on its way to engine failure. A Boxster 987.1 with a freshly overhauled soft top can at the same time have a rear main seal (RMS) that announces itself through an oil film on the gearbox side. The roadster character of the Boxster is its biggest selling point — and the soft top is its most expensive wear item. Our inspector comes directly to the vehicle: over 100 inspection points, OBD diagnostics, soft-top function test, paint-thickness measurement, digital report within 24 h. From 289 euros incl. VAT and travel.

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Buying a used Porsche Boxster: what makes the check essential?

The Porsche Boxster is Porsche's purest vehicle concept: mid-engine, open top, two seats — no compromise, no rear bench, no all-wheel drive. This focus makes it one of the most emotional used-car purchases there is. And one that carries considerable financial risk without an independent inspection. checkdenwagen.de is an independent provider of on-site used-car inspections operating throughout Germany, based in Berlin with a network of inspectors across the country. Our inspector comes directly to where the vehicle is — no towing, no workshop appointment, no sales pressure — and examines your prospective Boxster for around 1.5 hours using an inspection catalogue of over 100 points. On the Boxster, the focus is on three areas that can become expensive cumulatively: first, the flat-six engine (IMS bearing, bore scoring, oil supply during cornering — affecting the 986 and 987.1 with the M96/M97 unit); second, the soft top as the mechanical-hydraulic heart of a roadster (sealing, hydraulic cylinders, mechanism, hoses); and third, the bodyshell weak points typical of the open-top concept (water box, pollen-filter drain, corrosion tendency). The result is a digital photo report with all findings — within 24 hours by email. Our USP: independent of the seller, transparent on price, on-site throughout Germany. Phone: 030 301 32 327.

Porsche Boxster check: what our appraiser inspects

Over 100 inspection points — Boxster-specific

Our inspection catalogue is tailored to the particulars of the roadster concept: mid-engine oil supply, IMS bearing assessment, soft-top hydraulics and sealing, water-box drainage and corrosion points typical of the bodyshell are the focus — not a generic car check.

Report within 24 hours

You receive the full digital photo report by email within 24 hours of the on-site inspection — annotated findings, paint thicknesses, OBD readout of all control units, photos of everything noteworthy.

From 289 euros incl. VAT

Fixed price from 289 euros (Standard) or 339 euros (Premium), each incl. VAT and travel. Travel is included in the fixed price — no hidden costs.

Independent of the seller

No interest in closing the deal, no commission, no ties to dealer or private seller. Our inspector works exclusively for you — that is the foundation of every independent check.

Porsche Boxster generations: 986, 987, 981, 718 — four risk profiles at a glance

Since its debut in 1996, the Porsche Boxster has been through four generations. The differences in the weak-point profile between generations are considerable — what applies to the Boxster 986 hardly affects the 981 or 718. Boxster 986 (1996-2004, M96 engine): The first Boxster is the most emotional and cheapest entry into the range — and the one with the highest risk profile. The M96 flat-six carries the notorious IMS bearing in its most vulnerable form (deep-groove ball bearing, single or double), which can fail at high mileage and with long oil-change intervals. Engine failure is usually an economic write-off. On top of that come the bore-scoring problem of the bore surfaces and the soft-top mechanism and hydraulics as a separate cost factor. The water box behind the front luggage compartment is a known corrosion trap. Despite these risks: a 986 with an IMS replacement, short oil-change intervals, a working soft top and a good service history can be a great buy. Boxster 987 (2004-2012, M97 engines and DFI from 2009): The jump from the 986 to the 987 is the most distinct step on the bodyshell side. On the engine side, the IMS problem remains on the early 987.1 (2004-2008, M97 engine) — albeit in a somewhat more robust bearing configuration than on the 986. From the Boxster 987.2 (from model year 2009, DFI direct injection) onwards, the IMS bearing in its problematic form disappears. The 987.2 is considered the more reliable entry without the historic IMS risk. New as a weak point on the 987: the rear main seal (RMS) on the gearbox side of the engine, which can start to leak at high mileage and cause oil loss at the gearbox. The soft top of the 987 generation is mechanically revised but still a separate inspection point. Boxster 981 (2012-2016): The 981 marks the clearest step up in maturity in Boxster history. The new naturally aspirated petrol engine (without the IMS-bearing complex of its predecessors) is considered considerably more reliable. The weak-point profile shifts to classic used-car topics: chassis wear, air-conditioning compressor, service history and — since the 981 is increasingly driven hard — track-day detection. A 981 with good documentation and no track history is an attractive Boxster. Boxster 718 (982, from 2016): With the 718, Porsche switches from the six-cylinder naturally aspirated engine to a four-cylinder turbo (2.0 T, 2.5 T S). The weak-point profile changes fundamentally: the particulate filter (OPF/GPF) is a maintenance topic, the turbo setup demands different oil intervals, and the sound was a much-discussed topic in the community. The IMS problem of the predecessors does not exist on the 718. As a relatively young model, 718 examples are often still under warranty or in good service condition.

Porsche Boxster weak points: what our check specifically looks for

IMS bearing (intermediate shaft bearing) — Boxster 986 and 987.1

The intermediate shaft bearing (IMS bearing) is the best-known and most consequential weak point in the Porsche flat-six. In the M96 engine of the Boxster 986 and the early M97 of the Boxster 987.1 (up to model year 2008), the IMS bearing sits as a roller bearing on the intermediate shaft that drives the camshafts. With wear — encouraged by long oil-change intervals, high mileage and poor oil quality — the bearing can fail and carry metal shavings into the oil circuit. The result is usually engine failure that economically amounts to a write-off. An IMS replacement by a specialist workshop (LN Engineering or similar providers) is the only prevention. Our inspector checks the engine oil for metallic debris, assesses the service history for an IMS change and gives a generation-specific risk assessment.

Bore scoring — bore-surface wear in the M96/M97 flat-six

Bore scoring refers to wear of the cylinder bore surfaces in the Porsche flat-six of the 986 and 987 generations. As a mid-engine vehicle, the Boxster experiences lateral g-forces during cornering that can briefly interrupt the engine's oil supply when the oil level is low — a mechanism that over time leads to grooves and scratches forming in the bores. Typical symptoms are increased oil consumption, blue smoke when warm and a rough cold start. An endoscopic visual inspection of the cylinders is the gold standard — our inspector records all external indicators and recommends this next step where there is reason to suspect it. An M96/M97 damaged by bore scoring is an expensive engine failure.

Soft-top hydraulics and sealing — the core topic of any roadster

The Boxster's folding soft top is the defining difference from the Cayman — and its most expensive wear item. The electro-hydraulic soft-top mechanism of the 986 and 987 consists of hydraulic cylinders, hoses, pumps and numerous sealing points. Typical problems: leaking hoses or hydraulic cylinders (oil loss, delayed opening/closing, mechanical jamming), soft-top seals on the side frames and the top edge of the windscreen (leaks lead to water ingress in the interior), worn fabric or plastic windows. Our inspector opens and closes the soft top several times, visually checks all hydraulic points, and inspects the seals and cabin condition for signs of moisture.

Water box and pollen-filter drain — corrosion trap on the 986

On the Boxster 986, the water box behind the front boot lid is a well-known moisture trap: leaves, dirt and organic material collect in the water-box drain and can block the channel. The water then runs into the vehicle electrics or the footwell mats, causing corrosion in the front bodyshell area, mould in the interior and control-unit damage. Our inspector checks the water box for condition and a clear drain, inspects the interior for signs of moisture, and looks for rust spots at the corrosion points typical of the front of the vehicle.

Rear main seal (RMS) — Boxster 987

The rear main seal (RMS) sits on the gearbox side of the engine on the Boxster 987 and seals the crankshaft against the gearbox. With high mileage or neglected engine oil, it can start to leak — recognisable by an oil film at the engine-gearbox joint face or an oily smell from the engine bay. A leaking RMS is not a disaster in itself, but it is a sign of needed repair. Our inspector systematically checks the engine-gearbox joint face for oil traces and assesses the finding in the context of mileage and service history.

Track-day detection — roadster with sporting wear

The Porsche Boxster is a popular track-day car — mid-engine layout, low centre of gravity, precise steering. Track use is not automatically a problem if the vehicle was consistently serviced afterwards. It becomes problematic when it has been concealed and the vehicle is advertised as a leisure car. Typical indicators: asymmetric tyre wear from extreme lateral g-forces, heat-discoloured brake discs with hot zones, traces of helmet storage or harness mounts in the interior, OBD entries for stability-system deactivations, and remnants of number-plate tape. Our inspector knows where to look.

Clutch — wear and cost on the manual

The Porsche Boxster is offered almost exclusively with a manual gearbox or the optional Tiptronic automatic. A worn clutch on the manual is a typical used-car item — but on the Boxster, the mid-engine layout makes it considerably more involved to replace than on a front-engine car. Vehicles driven hard wear the clutch out significantly faster. Our inspector checks the clutch bite point, slip behaviour under load and the pedal feel, as well as acoustic anomalies when engaging gear — and documents the last clutch change from the service records.

Brakes and chassis — sporting wear and track patterns

Boxster brake discs on a vehicle driven hard show characteristic heat patterns, grooves and uneven pad wear as evidence of intensive braking use or track operation. Vehicles with the optional sport package (PASM, sports suspension) have increased chassis wear on the dampers, wishbone bushings and tie rods. Our inspector photographically documents the brake-disc and pad condition at all four wheel arches and checks the chassis for play and wear noises.

Air-conditioning compressor — typical of convertibles

Open-top vehicles like the Boxster are often driven in Germany only during the warm season — with the result that the air conditioning sits idle for months. Air-conditioning compressors that are rarely used are prone to leak problems at O-rings and shaft seals, because the lubricant fails to circulate through the refrigerant circuit. A defective compressor is a noticeable repair item. Our inspector checks the air conditioning for cooling performance and compressor running behaviour.

Four-cylinder turbo on the 718 Boxster — different topics, different inspection points

From the Boxster 718 (982, from 2016) onwards, the IMS topic disappears entirely — the four-cylinder turbo engine (2.0 T or 2.5 T S) has a different technical profile. Inspection points on the 718: turbocharger condition and oil supply, particulate-filter status (OPF/GPF, especially with short-trip-heavy use), intercooler and cooling system, and gearbox oil on the PDK. As a younger generation, the 718's risk profile is lower overall — but here too it applies: service history, OBD readout and track-day inspection are a must.

Service history and originality — value factor and safety indicator

On the Boxster, the service history is not an afterthought but a direct price indicator — especially on the 986 and 987.1, where the question of an IMS replacement and oil-change interval significantly affects the vehicle's value. Gaps in the service booklet, missing workshop invoices for IMS work, or signs of oil-change intervals exceeding 20,000 km are warning signs. Equally important: odometer-reading plausibility on sought-after 986 examples and signs of previous-owner tuning. Our inspector compares mileage, service intervals and vehicle age for plausibility.

Leaking window frames and interior moisture

On the Boxster as an open-top vehicle, the window-frame seals and the soft top are the only barrier against the weather. Leaking windscreen top edges, perished door seals or soft-top seals lead to moisture ingress into the interior in the rain — with consequences for the carpet, the electronics and, in the long term, mould formation. A thoroughly damp interior is expensive to restore. Our inspector systematically checks all sealing areas and looks for signs of moisture in the footwell, under the seats and in the boot.

M96, M97, MA1, EA888: which Boxster engine suits you?

Over its history, the Boxster has seen four fundamentally different engine concepts — with equally different risk profiles. M96 (Boxster 986, 1996-2004): The first Boxster flat-six is a naturally aspirated engine with 2.5 to 3.2 litres of displacement, air-cooled via a water radiator — a transitional concept after the move away from the air-cooled engine. The IMS bearing in the early M96 version is considered the most vulnerable in the entire flat-six family. Anyone buying a 986 has to ask about the IMS status first. A 986 with a documented LN Engineering IMS replacement and short oil-change intervals is a different vehicle from one with no documentation at all. M97 (Boxster 987.1, 2004-2008): A technically further-developed flat-six with 2.7 or 3.2 litres. The IMS bearing remains present, but in a somewhat improved configuration. The bore-scoring complex still applies. On the 987.1, the RMS (rear main seal) and the soft-top mechanism come in as their own inspection topics. As a rule: a 987.1 with an IMS replacement and good service is a solid buy. DFI engine (Boxster 987.2, from 2009): With direct injection (DFI), the IMS bearing in its problematic form disappears. The 987.2 is considered the most reliable entry into the classic Boxster era — a significantly lower risk level than the 986 and 987.1, without ignoring the IMS topic entirely (the RMS remains an inspection point). MA1 (Boxster 981, 2012-2016): A completely newly developed naturally aspirated engine, without the IMS problems of its predecessors. The risk profile of the 981 is more akin to that of a modern sports car than a high-risk model — chassis wear, air conditioning, soft-top sealing and track-day detection take centre stage. EA888 turbo / 9A2 (718 Boxster, from 2016): A four-cylinder turbo with 2.0 or 2.5 litres. No IMS, no bore scoring of the old kind. Inspection priorities: turbo oil supply, particulate filter, PDK service. The 718 is technically the lowest-risk model — but also the youngest, and therefore the one with the least accumulated high-mileage experience.

Used Porsche Boxster: what determines the price?

The used market for the Porsche Boxster is heavily shaped by generation and documentation status — and the price differences between a well-kept and a neglected example of the same generation are considerable. Boxster 986: As the cheapest entry into the Porsche world, 986s are popular with first-timers — which makes the market for poorly maintained examples disproportionately large. A 986 without an IMS replacement and with a patchy service history is a risk despite the low purchase price, one that can quickly eat up the supposed price advantage. A 986 with an IMS upgrade, short intervals and a good soft top, by contrast, trades significantly higher — and rightly so. Boxster 987.1: Priced above the 986, but with the same IMS risk on the early 987.1. On the 987.1, evidence of an IMS replacement and a clean RMS is the decisive value factor. Vehicles with the Sport Chrono package, sports suspension or other Porsche options are more sought-after on the market. Boxster 987.2 (from 2009): The IMS-free version commanded, and still commands, a premium over the 987.1 — rightly so, since the main risk is gone. Well-documented 987.2s are an attractive buying option with a moderate risk level. Boxster 981: As a younger model with the revised engine, the 981 is the most attractive option for buyers who want the open-top Boxster driving experience without the IMS chapter. Prices reflect this: 981s trade higher than comparable 987s. 718 Boxster: As the most recent production generation, the 718 has the highest used prices in the range. checkdenwagen's Premium package adds a qualitative market-price assessment to the inspection — helpful in negotiations.

How your Porsche Boxster check works

Book online — in five minutes

Tell us the vehicle location (postcode) and the listing link. Travel is included in the fixed price — no hidden costs. No phone call needed.

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Inspector drives to the Boxster — approx. 1.5 hours

An experienced automotive appraiser from our nationwide network arranges the appointment directly with the seller. He inspects your prospective Boxster on-site for around 1.5 hours: soft-top function test (open, close, hydraulics, sealing), engine-oil inspection for metal debris (IMS indicator), OBD readout of all control units, paint-thickness measurement, chassis inspection, water-box check and document review. You don't have to be there.

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Digital report within 24 hours

You receive the full inspection report by email: paint-thickness heatmap, OBD findings and codes explained, photos of all defects, soft-top and moisture assessment, service-history plausibility and an overall rating per inspection category. Clearly structured, plainly written — directly usable in price negotiations.

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Frequently asked questions about the Porsche Boxster check

The IMS bearing (Intermediate Shaft Bearing) is a roller bearing in the flat-six engines of the M96 and M97 series — fitted in the Boxster 986 (1996-2004) and Boxster 987.1 (2004-2008). It sits on the intermediate shaft that drives the camshafts. The bearing is undersized for the long-term operating conditions of a high-performance sports car and is prone to failure with high mileage, long oil-change intervals or poor oil quality. A failed IMS bearing sends metal shavings into the oil circuit and usually results in an engine write-off. A preventive IMS replacement (e.g. LN Engineering) is the only reliable safeguard. Our inspector assesses the engine oil, service history and mileage for IMS risk and gives you a clear verdict.

Buy your Porsche Boxster on facts, not gut feeling.

IMS failure, a leaking soft top, a hidden track-day past — the most expensive Boxster problems are invisible. Our inspection gives you the facts. From 289 euros incl. VAT and travel.

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