Porsche Repair & Diagnostics in Miami

Green's Garage is an independent Porsche specialist in Miami, working across the 911 from the 996 to the 992, the Boxster and Cayman in both mid-engine generations, the Cayenne, Panamera, Macan, and the electrified Cayenne, Panamera and Taycan. Same family, same address, since 1957.

Porsche is a platform where the difference between a diagnosis and a guess is measured in engine blocks. A rough idle on a 996 answered with ignition coils can mask an IMS bearing already putting metal into the oil. A ticking 997 answered with an oil change can be bore scoring. Every Porsche that comes in here gets a manufacturer-level multi-module scan with live data, and a physical inspection driven by what that scan actually shows.

The Three Things That Kill Miami Porsches

IMS bearing — 996, 997.1, 986 Boxster, 987.1 Cayman

The intermediate shaft bearing in the M96 and M97 engines fails without reliable warning and takes the engine with it. It affects the 996 Carrera, the 997.1 Carrera, the 986 Boxster and the 987.1 Cayman.

Two important exclusions that get this wrong constantly: the Turbo and GT models are not affected — 996 Turbo, 996 GT3, 997 Turbo and 997 GT3 all use the Mezger engine, which does not share this failure mode. And 2009 and later 997.2 and 987.2 cars use the DFI 9A1 engine, which has no IMS at all.

If you own an affected car and the bearing has never been assessed or replaced, that is the conversation we have first, regardless of what brought you in. If you own a Turbo, a GT3, or a 2009-and-later car, you should not be paying anyone to worry about it.

Bore scoring — 997 and 991 flat-six

Less famous than IMS and, on later cars, more common. Cylinder wall scoring on the M97 3.8 and on some 9A1 engines presents as cold-start ticking, elevated oil consumption, and a smell of fuel in the oil. It is diagnosable with a borescope through the plug holes before it becomes a rebuild. If a shop has told you a Porsche flat-six "just uses oil," that is not a diagnosis.

Air-oil separator — all water-cooled flat-six

The AOS is the single most misdiagnosed component on the 911, Boxster and Cayman. A failed diaphragm produces heavy blue smoke, a rough idle, oil consumption, and vacuum readings that look like an intake leak. Shops chase intake gaskets and coils for weeks on cars that need a $400 part. It is a five-minute vacuum test.

What Miami Does to a Porsche

Miami is not a seasonal climate, so nothing here gets a recovery period. Cars accumulate heat cycles year-round.

Cayenne 955 and 957 V8 plastic coolant pipes. The pipes in the engine V are a documented failure that dumps coolant with no warning and no repair option short of dropping the intake. This is the Cayenne's tow-truck failure, and Miami's heat brings it forward.

Cooling systems generally. Water pumps with plastic impellers on flat-six cars, coolant tank cracking on Boxster and Cayman, thermostat housings across the range. In a climate that never lets the system cool down, these arrive early.

Seals and gaskets. Rear main seals, cam cover gaskets, and turbo oil lines harden faster under sustained underhood temperature. On the mid-engine cars the engine sits in the hottest packaging Porsche builds, and it shows.

Air suspension and bushings. UV and heat degrade Cayenne and Panamera air springs, and a leaking bag makes the compressor run until the compressor fails too. Rubber bushings on every model go early.

Brakes and humidity. Slide pin corrosion, brake fluid moisture absorption, and rotor thickness variation from stop-and-go heat cycling all run ahead of the book interval here.

Porsche Hybrid & EV — Cayenne E-Hybrid, Panamera E-Hybrid, Taycan

We service Porsche's electrified range: high-voltage battery state of health, thermal management, on-board charger and charging faults, inverter cooling, and the regenerative braking systems that behave nothing like conventional brakes when they misbehave. Miami's heat gives a Taycan or E-Hybrid pack a harder thermal duty cycle than almost anywhere in the country.

Full detail on the Porsche hybrid & EV page.

Porsche Systems We Diagnose

A/C not cooling

Cold at highway speed and warm at idle points at condenser fan output, not refrigerant charge, and the Cayenne and Panamera make it obvious first because of cabin volume. We test fan output at Miami idle ambient, confirm refrigerant specification before adding anything — 718 and later cars use R1234yf and need the right equipment — assess blend door actuators against commanded position, and check the evaporator for humidity mold. Mid-engine Boxster and Cayman evaporator access is its own procedure and we quote it honestly. → Porsche A/C Repair & Diagnostics Miami

PASM, PDCC and air suspension

PASM adaptive damper faults report through the chassis modules and need manufacturer-level access to read properly. On air-sprung Cayenne and Panamera, corner height gets measured physically and compared against module-reported height before a single strut is condemned — a drifting height sensor makes an intact system look failed, and that misdiagnosis is the most expensive routine error in the category. PDCC hydraulic anti-roll faults on Turbo and GTS models are diagnosed at the actuator, not by symptom. → Porsche Suspension Diagnostics & Repair Miami

Brakes, PSM and PCCB

A PSM or ABS warning is an active safety fault, not a service reminder — wheel speed sensor, brake pressure sensor and yaw sensor faults all present similarly and are three different repairs. PCCB carbon-ceramic systems need the correct pad compound; the wrong compound glazes the rotor and produces a vibration that comes back after every attempt to resurface it. Cayenne and Panamera electronic parking brakes require electronic retraction before rear pad service. Slide pin corrosion and fluid moisture are Miami constants across the range. → Porsche Brake Diagnostics & Repair Miami

Engine, oil leaks and cooling

Flat-six cars: IMS assessment where applicable, borescope for bore scoring, AOS vacuum test, rear main seal and cam cover mapping, water pump and coolant tank. Cayenne and Panamera V8: coolant pipes, timing chain tensioners, turbo oil lines, both banks mapped before any teardown is quoted. Macan and the V6 turbo cars share EA888 and EA839 architecture with Audi — timing chain, carbon buildup, PCV separator, oil consumption without a visible external leak.

On any V-configuration engine we quote both banks. Repairing one and leaving the other means paying the same access labor twice inside a year.

Porsche Models We Service

Model or variant not listed? Call (305) 444-8881 before booking and we'll tell you straight whether it's in scope.

How a Porsche Diagnostic Works Here

1. History and symptom characterization. Generation, engine code, modifications, prior work, and exactly when the symptom appears. On 996, 997.1, 986 and 987.1 cars, the IMS conversation is part of the first discussion whether or not it's why you came in.

2. Full multi-module scan with live data. Engine, transmission, chassis, PSM, body, safety and infotainment modules. Active and stored faults distinguished. Cam correlation values, timing chain deviation, adaptation data — the numbers, not a code list.

3. Physical inspection directed by the scan. Borescope for bore scoring where indicated. AOS vacuum test before anyone touches an intake gasket. Corner height measured on air-sprung cars. Coolant pipe assessment on 955 and 957 Cayenne. Each step confirms a specific finding.

4. Verification. Road test, pressure test, or commanded component test to prove the cause before any repair is recommended.

5. Documented findings and itemized authorization. Root cause stated specifically, full cost before work starts, nothing done without your approval.

Why Miami Porsche Owners Choose Green's Garage

• We know which cars actually have an IMS problem — and we will tell you when yours doesn't, instead of selling you a bearing job on a Mezger engine
• Bore scoring borescoped, not shrugged off — oil consumption on a flat-six is a diagnosable condition
• AOS tested before intake gaskets are quoted — the most misdiagnosed part on the platform, found in five minutes
• Coolant pipes flagged on 955 and 957 Cayenne — before the tow truck, not after
• Height measured before struts are condemned on air-sprung Cayenne and Panamera
• Correct PCCB pad compound — the wrong one glazes the rotor and the vibration never goes away
• Both banks quoted on V8 gasket work — you pay the access labor once
• Porsche EV and E-Hybrid in scope — Taycan, Cayenne E-Hybrid, Panamera E-Hybrid
• Independent, not a dealer — no franchise service targets
• ASE Master Certified technicians
• Serving Miami and Coral Gables since 1957 — three generations, same family
• 2-year / 24,000-mile warranty on qualifying repairs
• 850+ Google reviews
• Free Uber/Lyft within 5 miles · Financing available · Habla Español

Porsche Repair FAQ

Does my 911 have the IMS bearing problem? Depends on the car. Affected: 996 Carrera, 997.1 Carrera, 986 Boxster, 987.1 Cayman. Not affected: any Turbo or GT3 from those generations, which use the Mezger engine, and any 2009-or-later 997.2 or 987.2, which use the DFI engine with no intermediate shaft. If someone quoted an IMS job on a GT3, get a second opinion.

My Boxster burns oil and blows blue smoke. Is the engine finished? Usually not. That is the classic air-oil separator failure signature, and it is a straightforward repair. It gets misdiagnosed as rings, valve seals or intake leaks constantly. A vacuum test settles it quickly.

My 997 ticks on cold start and uses oil. What is that? Worth borescoping for cylinder bore scoring before assuming anything else. Caught early it changes the options available to you; caught late it doesn't.

Do you work on the Taycan and the E-Hybrids? Yes — high-voltage battery health, thermal management, charging and on-board charger faults, inverter cooling, and regenerative braking systems. See our Porsche hybrid & EV page.

Is an independent shop a real alternative to the Porsche dealer? Outside warranty work, yes, provided the shop has manufacturer-level scan access and genuinely knows the generational differences. We are not working against a franchise service target, and we will tell you when something is not worth doing.

How much is a Porsche diagnostic? Quoted before we start and dependent on complexity — an intermittent chassis fault takes longer than one stored code with a clear symptom. You get the number up front and a full itemized estimate before anything is authorized.

Where are you and who do you serve? 2221 SW 32nd Ave, Miami, FL 33145 — serving Miami, Coral Gables, Coconut Grove, Brickell, Key Biscayne, South Miami and Pinecrest.

Schedule Your Porsche Diagnostic in Miami

Warning light, A/C that quit in August, an oil leak, a PASM fault, a brake concern, oil consumption nobody has explained, or a repair somewhere else that didn't hold — start with a diagnostic. We find the cause before we recommend the fix.

Call (305) 444-8881 or schedule online. We are at 2221 SW 32nd Ave., Miami, FL 33145, open Monday through Friday, 8:00 AM to 6:00 PM.

Got a quote you're not sure about? We also offer a second opinion service.