Porsche Boxster & Cayman (718) known issues by generation

By CarWhere Research · Updated

The mid-engine Boxster and Cayman share engines with the 911 of the same era, so early cars carry the same M96/M97 concerns. From the 2009 refresh on, the main items are recalls and routine wear. CarWhere lists 9 documented Boxster & Cayman (718) issues, including 3 NHTSA safety recalls, each with affected years, symptoms, pre-purchase checks and a source.

Boxster & Cayman (718) generations at a glance

Porsche Boxster & Cayman (718) generations and the known issues listed for each
GenerationModel yearsIssues on this page
986 Boxster1997–2004Intermediate shaft (IMS) bearing failure · IMS class-action settlement — now expired · Cylinder bore scoring · Rear main seal (RMS) leaks
987.1 Boxster / Cayman2005–2008 (Cayman from 2006)No widespread issue documented here
987.22009–2012No widespread issue documented here
9812013–2016 (Cayman from 2014)981: infotainment glitches, early roof stitching, rare fuel pump faults · 981 rear-axle carrier recall
982 (718)2017–present718 luggage-compartment bracket / fuel-leak recall · 2021 GT4 / 4.0 connecting-rod recall · 718 water pump and thermostat wear

Porsche 986 Boxster problems (1997–2004)

Intermediate shaft (IMS) bearing failure (1997–2008)

Major repair
Generation:
986, 987.1
Years:
1997–2008
Engine:
M96 / M97 flat-six

Early Boxsters and Caymans use the same IMS design as the 996 and 997.1 911. A failed bearing usually wrecks the engine. Cars built roughly from late 2005/2006 on got a stronger bearing that fails far less often, and most early cars have now had a retrofit. The 2009-on 987.2 engines removed the intermediate shaft entirely.

Symptoms

  • Often no warning
  • Metal in the oil filter
  • Rattle from the rear of the engine

Check before buying

  • Ask for invoices for an IMS retrofit, often done with a clutch
  • Confirm the engine number and build date
  • Inspect the oil filter for debris

Reported repair cost: About $3,000 for a preventive bearing replacement with clutch disc; $20,000–$30,000 for an overhaul after a failure (911 figures, same engine family)[1]

Sources: [5][6][3][1]

IMS class-action settlement — now expired (Cars built May 2001–Feb 2005)

Minor
Generation:
986 Boxster built 2001–2004
Years:
Cars built May 2001–Feb 2005
Engine:
M96 flat-six

The Eisen v. Porsche settlement covered most 2001–2005 Boxsters along with 911s. It paid part of IMS repair costs within 10 years or 130,000 miles of the in-service date. That window has passed for every covered car.

Check before buying

  • Treat settlement coverage as gone
  • Ask whether any earlier failure was fixed under it

Sources: [3][4]

Cylinder bore scoring (1997–2008)

Major repair
Generation:
986, 987.1
Years:
1997–2008
Engine:
M96 / M97 (mainly the 3.4 in Boxster S and Cayman S)

Scoring of the cylinder walls raises oil consumption and eventually needs a rebuild. In the Boxster and Cayman it is tied mostly to the 987.1's 3.4 S engine; one marque estimate puts it at about one in 20 pre-direct-injection cars. It is rarely reported on the 2.7.

Symptoms

  • Heavy oil use
  • Tapping at idle
  • Oily or sooty tailpipe

Check before buying

  • Ask for a borescope inspection
  • Check the oil level and ask about top-ups
  • Consider an oil analysis

Sources: [5][6][2]

Rear main seal (RMS) leaks (1997–2008)

Minor
Generation:
986, early 987
Years:
1997–2008
Engine:
M96 / M97

The seal at the back of the crankshaft can seep oil. The leak is usually small and can wait until the clutch is replaced, since both jobs need the gearbox off. The problem was largely fixed during the 987 run.

Symptoms

  • Oil residue between engine and gearbox

Check before buying

  • Look under the car at the engine/gearbox joint
  • Ask whether the seal was done with the last clutch

Sources: [5][6]

Porsche 981 problems (2013–2016)

981: infotainment glitches, early roof stitching, rare fuel pump faults (2013–2016)

Minor
Generation:
981
Years:
2013–2016
Engine:
9A1 flat-six

A PCA dealer technician reported no major mechanical patterns on the 981. The most common complaint is an infotainment unit that restarts or loses navigation. Early convertible tops can come unstitched at the fold. A very small number of cars lose high-pressure fuel pump pressure and go into limp mode.

Symptoms

  • Infotainment screen rebooting while driving
  • Loose stitching where the top folds
  • Sudden limp mode

Check before buying

  • Test the infotainment and navigation
  • Inspect the roof fold line
  • Ask about any fuel pump replacement

Sources: [7]

981 rear-axle carrier recall (2013–2015)

Safety recall
Generation:
981
Years:
2013–2015
Engine:
All

On some 2013–2015 Boxsters and 2014–2015 Caymans, the side sections of the rear-axle carrier may crack. A fracture could affect handling. Dealers fix it for free under the recall.

Check before buying

  • Confirm the recall is closed for the VIN

NHTSA recall: 21V-679 (2021-09) · 4,934 vehicles

Sources: [9]

Porsche 982 (718) problems (2017–present)

718 luggage-compartment bracket / fuel-leak recall (2017–2019)

Safety recall
Generation:
982 (718)
Years:
2017–2019
Engine:
2.0 and 2.5 turbo flat-four

In a crash, a crossmember on early 718 Boxsters and Caymans could detach from the front luggage-compartment bracket and puncture the fuel system. Porsche recalled more than 14,000 U.S. cars to fix it.

Check before buying

  • Confirm this recall was completed

NHTSA recall: 19V-113 (2019-02) · 14,388 vehicles

Sources: [10][8]

2021 GT4 / 4.0 connecting-rod recall (2021)

Safety recall
Generation:
982 (718) GT4, Spyder, GTS 4.0
Years:
2021
Engine:
4.0 flat-six

A batch of 2021 4.0-liter cars got connecting rods that could crack. That can lead to engine damage, a stall, or an oil leak. Porsche replaced the rods, or the whole engine if it had already been run.

Check before buying

  • Confirm recall AMA4 / 21V-200 was completed
  • Ask for paperwork on any replacement engine

NHTSA recall: 21V-200 (2021-03) · 193 vehicles

Sources: [11][8]

718 water pump and thermostat wear (2017–present)

Minor
Generation:
982 (718)
Years:
2017–present
Engine:
2.0 / 2.5 turbo flat-four

Water pumps and thermostats on the four-cylinder 718 have been known to fail. A leaking pump can also foul nearby vacuum parts. Overheating can come from a leaking transmission cooler valve too.

Symptoms

  • Coolant smell or drips
  • Overheating warnings
  • Intermittent faults in cold weather

Check before buying

  • Look for coolant stains under the car
  • Check service records for cooling-system work

Sources: [8]

Related Boxster & Cayman (718) research

This page explains specific mechanical issues. For which model years drew the most owner complaints, see the years-to-avoid research — a different question, answered from NHTSA complaint and service-bulletin counts.

Confirm exactly how a Boxster & Cayman (718) was built before you buy.

Engine, gearbox and factory options decide which of these issues apply. The CarWhere build sheet decodes a Porsche Boxster & Cayman (718) VIN into its factory record — option codes, paint, interior and equipment as built. $9.99, instant.

Porsche build sheet by VIN

Frequently asked questions

What are the most common Porsche Boxster & Cayman (718) problems?

The best-documented Porsche Boxster & Cayman (718) issues are intermediate shaft (IMS) bearing failure (986, 987.1, 1997–2008) and cylinder bore scoring (986, 987.1, 1997–2008). How much each matters depends on the generation and engine, so check the section for the exact car you are looking at.

Which Boxster & Cayman (718) years are affected by intermediate shaft (IMS) bearing failure?

Intermediate shaft (IMS) bearing failure applies to 986, 987.1 cars (1997–2008, M96 / M97 flat-six). Early Boxsters and Caymans use the same IMS design as the 996 and 997.1 911.

Has the Porsche Boxster & Cayman (718) had any safety recalls?

Yes. Recalls covered on this page include 981 rear-axle carrier recall (NHTSA 21V-679), 718 luggage-compartment bracket / fuel-leak recall (NHTSA 19V-113) and 2021 GT4 / 4.0 connecting-rod recall (NHTSA 21V-200). Recall repairs are free at a Porsche dealer; check any specific car’s VIN with NHTSA to see whether its recall work was completed.

What should I check before buying a used Porsche Boxster & Cayman (718)?

Ask for invoices for an IMS retrofit, often done with a clutch. Ask for a borescope inspection. A pre-purchase inspection by a Porsche specialist covers these and pulls the service history.

Is the Porsche Boxster & Cayman (718) reliable?

Most well-known Porsche Boxster & Cayman (718) problems are tied to specific generations or engines rather than the model as a whole, and many have a known fix or retrofit.

Sources

Issue descriptions are CarWhere’s own summaries of the sources below. Generations covered: 986 Boxster (1997–2004), 987.1 Boxster / Cayman (2005–2008 (Cayman from 2006)), 987.2 (2009–2012), 981 (2013–2016 (Cayman from 2014)), 982 (718) (2017–present). Repair costs are shown only where a source states them and vary by shop and region.

  1. Your Handy Porsche 996 Buyer's Guide — Hagerty
  2. Bore scoring and how to prevent it (sponsored content by LN Engineering) — Porsche Club of America / LN Engineering (secondary reference)
  3. Porsche IMS Engine Defect Class Action Lawsuit Settlement — Top Class Actions
  4. Lawsuit Has a Bearing on Porsche Owners — Sports Car Market
  5. Porsche Boxster (987) | PH Used Buying Guide — PistonHeads
  6. Used car buying guide: Porsche Boxster (987) — Autocar
  7. Model Guide: 2013-2016 Porsche Boxster and Cayman — Porsche Club of America
  8. Porsche 718 Cayman | PH Used Buying Guide — PistonHeads
  9. NHTSA Recall 21V-679: 2013–2015 Boxster/Cayman rear-axle carrier — NHTSA
  10. NHTSA Recall 19V-113: 718 Boxster/Cayman luggage compartment bracket fuel leak — NHTSA
  11. NHTSA Recall 21V-200: 2021 718 4.0 connecting rods — NHTSA

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