Own a Porsche 911 in Daly City? Lucky you. But even these automotive icons can hit a bump in the road. At M & R Auto in Menlo Park, we've seen it all. Let's dive into seven common Porsche 911 problems and how to fix them. Intermediate Shaft (IMS) Bearing Failure The IMS bearing is the Achilles' heel of many 996 (1999-2005) and early 997 (2005-2008) models. It supports the intermediate shaft that drives the camshafts. When it fails, your engine's at risk. Listen for unusual noises. Watch for metal in your oil filter. Low oil pressure? That's a red flag. The fix? Replace the bearing with an upgraded version. We use ceramic or steel bearings that last longer. Regular oil changes help prevent this issue. So does a magnetic oil drain plug. Catch it early, save your engine. Rear Main Seal (RMS) Leaks Spot oil under your 996 or early 997? Smell burning oil? Your Rear Main Seal might be the culprit. This seal keeps oil in where the crankshaft meets the transmission. Over time, it hardens and cracks. Fixing it isn't easy. We need to remove the transmission. But it's worth it to stop the leak. We use high-quality seals and follow Porsche's guidelines. Don't ignore this. Oil leaks lead to bigger problems. Air-Oil Separator (AOS) Failure Your AOS keeps oil out of places it shouldn't be. When it fails, your 911 might burn oil, smoke, or run rough. It's common in 996 and 997 models, usually around 60,000 to 90,000 miles. Replacing it can be tricky. We need to remove parts to access it. But we use updated designs from Porsche for a reliable fix. Regular checks can catch this early. Cylinder Scoring Cylinder scoring is serious. It's especially common in early 997 models with M97 engines. Your cylinders develop grooves. Power drops. Oil consumption rises. You might see blue smoke. The causes are debated. Cold starts, oil quality, and manufacturing tolerances all play a role. We use a borescope to check for scoring. Minor cases? We can often fix those. Severe cases might need a rebuild. Prevention is key. Use the right oil. Let your engine warm up. Follow maintenance schedules. Hydraulic Valve Lifter Failure Hear a ticking from your 996 or early 997 engine? Could be the valve lifters. These keep your valves properly adjusted. When they fail, your engine gets noisy. You might lose power. Fixing them means getting deep into the engine. We replace all lifters as a set for consistency. Want to prevent this? Use good oil. Change it regularly. Address oil pressure issues quickly. Water Pump Failure Your water pump keeps coolant flowing. When it fails, your engine overheats. Watch for leaks or grinding noises. This issue hits 996 and 997 models hard. Replacing it involves draining the cooling system and removing several parts. We often replace the thermostat too. It's good preventive care. Use the right coolant. Change it on schedule. Listen for odd noises. Keep your 911 cool. Ignition Coil Pack Failures Misfires? Rough idle? Could be your coil packs. These provide the spark to fire your plugs. They're a common weak point in 996 and early 997 models. Heat and vibration take their toll. Replacing them is straightforward but accessing them can be tricky. We usually replace all coils at once. It ensures even performance. Use quality spark plugs. Keep your engine bay clean. It helps your coils last longer. Experiencing these issues? Don't wait. Small problems grow. At M & R Auto in Menlo Park, we know Porsches inside and out. We serve Daly City and the whole Bay Area. Our techs use the latest tools and genuine parts. We'll keep your 911 running like new. Why trust us? Experience. Expertise. We stay current on Porsche tech. We understand these complex machines. Your 911 deserves the best care. Ready for a check-up? Questions about your Porsche? Contact M & R Auto today. We're here to help. Our Menlo Park shop is convenient for Daly City drivers. Don't let issues linger. Let's keep your Porsche 911 in top form. Schedule now. Experience the M & R Auto difference.