The 2022 718 Boxster S with the 2.5L turbo flat-four is relatively new, but the 982-gen platform (2017-present) shares fundamental engine architecture with earlier 991.2 911s that revealed catastrophic bore scoring issues. Early failure patterns are emerging that mirror the older MA1.21 engine problems.
Cylinder Bore Scoring / Liner Failure
Occasional · high severity
Typical onset: 30,000-70,000 mi
Symptoms: Cold-start metallic rattling that disappears after warm-up, Excessive oil consumption (1 qt per 1,000 mi or more), White or blue smoke on cold starts, Loss of compression on cylinders 2 or 3 (most common), Check engine light with misfire codes P0302/P0303
Fix: Complete engine rebuild or short block replacement required. Dealerships typically go straight to factory short block. Independent shops may attempt bore honing and oversize pistons if caught early, but success rate is poor. 40-60 hours labor for short block swap including turbo removal, transmission drop, and reassembly.
Estimated cost: $18,000-28,000
Turbocharger Wastegate Rattle
Common · low severity
Typical onset: 20,000-50,000 mi
Symptoms: Metallic rattling from engine bay at idle or light throttle, Rattle disappears under boost or at higher RPM, No performance loss or codes initially, Sound most pronounced when engine is fully warmed
Fix: Wastegate actuator arm bushings wear prematurely. Requires turbocharger removal and wastegate assembly replacement or rebuild. Some owners live with it; others replace turbos under extended warranty. 8-12 hours labor per turbo, often both sides done simultaneously.
Estimated cost: $3,500-6,000
Intermediate Shaft (IMS) Bearing Confusion
Rare · low severity
Symptoms: Customer anxiety from internet research, Confusion about whether 718 has IMS bearing issue
Fix: NOT A REAL PROBLEM on 718 models. The MA1.21/MA2.0 turbo four uses timing chains, not the intermediate shaft design of older water-cooled flat-sixes. This is purely a knowledge issue—educate customers that IMS concerns don't apply here. Zero labor, zero cost.
Transmission Oil Cooler Leaks
Occasional · medium severity
Typical onset: 40,000-80,000 mi
Symptoms: Transmission fluid spots under vehicle (reddish, thinner than engine oil), Burnt transmission fluid smell after hard driving, Fluid level low on dipstick check, Harsh shifting when transmission is cold
Fix: Oil cooler line connections at transmission case develop seepage, or cooler itself cracks from road debris. Requires transmission drop on PDK models for proper access to cooler and lines. Manual transmissions slightly easier but still 6-8 hours. Replace cooler and all sealing surfaces.
Estimated cost: $1,800-3,200
Fuel Filter Clogging (Premium Fuel Markets)
Occasional · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Hesitation under full throttle acceleration, Limp mode activation during hard pulls, Fuel pressure codes P0087 (fuel rail pressure too low), Stumbling at highway speeds under moderate load
Fix: In-tank fuel filter clogs earlier than expected, particularly in regions with ethanol-blend fuels or contaminated station tanks. Requires fuel tank drop and pump module R&R. Filter is integrated into pump assembly on most model years—replace entire pump. 4-5 hours labor.
Estimated cost: $1,200-1,800
Engine Mount / Transmission Mount Fatigue
Common · low severity
Typical onset: 60,000-100,000 mi
Symptoms: Excessive drivetrain movement felt through shifter or steering wheel, Clunking when engaging drive or reverse, Vibration at idle that wasn't present when new, Visible cracking or oil saturation of rubber mount material
Fix: Mid-engine layout puts significant stress on mounts, especially rear transmission mount. Hydraulic engine mounts lose damping fluid. Replace all four mounts as a set for balanced results. 3-4 hours labor with proper lift access.
Estimated cost: $1,400-2,200
Owner tips
Check oil level every 500 miles religiously—excessive consumption is your earliest bore scoring warning
Use only Porsche-approved 0W-40 full synthetic; do NOT extend oil change intervals beyond 10,000 mi despite factory recommendation
Pre-purchase inspections MUST include borescope inspection of all four cylinders—visual scoring check is non-negotiable
Extended warranty is financial insurance against catastrophic engine failure; consider it mandatory on used purchases
Keep detailed service records—Porsche of America has covered some bore scoring cases as goodwill even outside warranty
Beautiful driving experience but the turbo flat-four is a ticking time bomb—only buy with comprehensive warranty or cash reserves for a $25K engine job.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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Fitment notes: Battery located in front trunk (frunk); AGM required for vehicle electronics
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Every control module on the 2018-2023 Porsche 718 Boxster S — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Transmission Control Unit (TCU)2.5 hr R&Rsecurity gateway +0.8 hr▸ programming details
📍 Transmission housing, driver side
🔧 PIWIS III + PPN subscription
⚠️ PDK transmission; requires adaptation and VIN coding; transmission oil change recommended during replacement
Power Steering Control Unit (EPS)2.0 hr R&Rsecurity gateway +0.5 hr▸ programming details
📍 Steering column, below dashboard
🔧 PIWIS III + PPN subscription
⚠️ Electric power steering; steering angle sensor calibration and torque sensor adaptation required
⚠️ Optional; calibration required after replacement
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2022 Porsche 718 Boxster S 2.5L Turbo H4 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.