The Porsche 996 has matured into a fantastic and accessible modern classic. But like any performance car with a bit of age under its belt, it has a few well-documented weaknesses. Whether you’re a long-time owner or a prospective buyer, here are the five most common 996 problems—and how to deal with them appropriately.
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IMS Bearing Failure
The infamous Intermediate Shaft (IMS) bearing failure is arguably the most talked-about issue with the 996. Unfortunately, it’s not just internet folklore—failures do happen, and when they do, they can be catastrophic.
The IMS bearing, located at the rear of the engine below the crankshaft, can overheat and break down. When it collapses, metal debris can enter the engine, block oil passageways and cause extensive internal damage.
The Fix:
We’ve been upgrading IMS bearings for over a decade with a proven, high-quality solution that uses cylindrical roller bearings. These are better equipped to handle the load and heat, require no additional oiling systems, and come with a 5-year warranty. It’s a popular upgrade that gives owners peace of mind.
Starting from: £800 + VAT.
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Worn Suspension Components
With early 996s now well over 20 years old, suspension wear is prevalent. These systems endure all sorts of punishment—from potholes, road salt, and aggressive driving to long-term storage, which brings its own complications.
Common issues include:
- Perished rubber bushes
- Leaking dampers
- Broken bump stops
- Worn-out bearings
The Fix:
We recommend a full suspension health check—just £320 + VAT—for a comprehensive 11-page report detailing current condition and future needs. If components are worn out, refreshing the suspension in axle pairs or performing a full overhaul yields the best results. After that, a tailored geometry setup can dial in the perfect handling for your needs.
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Exhaust System Corrosion
The 996’s rear-engine layout means a relatively short exhaust system—but that doesn’t make it immune to problems. Exposure to road grime, heat cycles, and condensation often leads to corrosion at joints, flanges, and clamps.
Symptoms:
- Exhaust leaks (often audible)
- Engine management lights
- Reduced performance
The Fix:
A wide range of OEM and aftermarket exhaust upgrades is available. These not only address corrosion issues but can also enhance performance and sound quality. Replacing restrictive stock components with sport cats or X-pipes can free up power and torque while giving your 996 a more characterful tone.
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Air/Oil Separator Failure
That big cloud of white smoke from the rear? It might look terminal—but in many cases, it’s simply the air/oil separator giving up.
The separator’s job is to extract oil vapour from the engine and return it to the intake in a controlled way. When it fails, it can suck actual engine oil into the intake, creating a dramatic smoke show and poor engine running.
The Fix:
Luckily, it’s not a big job. Replacing the air/oil separator is relatively straightforward and cost-effective—especially if you’re already working in the area or have the engine out for another job. It’s a smart preventative replacement.
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Slow Cranking at Start-Up
Does your 996 feel reluctant to fire up—especially when warm or on cold mornings? Slow cranking is a common issue and can have several root causes.
Possible culprits:
- Weak or ageing battery
- Corroded earth straps
- Faulty starter motor
- Poor alternator performance
The Fix:
Rather than guesswork and part-swapping, our experienced technicians can pinpoint the root cause with proper diagnostics, saving time and money.
Final Thoughts
The 996 offers fantastic performance, timeless design, and a rewarding driving experience, especially when properly maintained. With proactive care and expert servicing, you can avoid most of the common issues and enjoy the car with confidence.
Need help with any of these issues?
Get in touch with our workshop team for a detailed inspection or tailored service plan for your 996.
