Perhaps the most worrying and trickiest problem to diagnose is the dreaded subframe cracks or tears. The SMG pump is something you should address unless you see that your example has had a recent replacement prior to your ownership. Now, the physical mechanism itself is available separately, making this a few hundred dollars rather than thousands.
#BMW M3 E46 2006 FULL#
Back in the day, that meant shelling out several thousand dollars for a full SMG unit. It is common for the SMG pump to fail, which renders your E46 M3 useless. SMG Pumpįor you SMG owners, the SMG pump was once a dreaded failure. We have handy gasket kits put together for the valve cover gasket and rear main seal, crankshaft, and oil pan gasket that will get you started.
#BMW M3 E46 2006 MANUAL#
Both the manual and SMG versions use the same parts. Since the transmission will need to come out, it’s best to go ahead and replace your clutch at the same time with a new clutch kit.
#BMW M3 E46 2006 UPGRADE#
Our Exact-Fit stainless steel VANOS line is a perfect upgrade that tackles that concern, but for the rear main seal, you have a bit more work cut out for you. All the gaskets except the rear main seal are relatively accessible. The most common oil leaks are from the oil filter housing, VANOS oil line, the front main seal, oil pan, and rear main seal. You will likely encounter one or more leaks on the aging S54 and will want to address them immediately. We wouldn’t call this a ‘common problem’ so much as maintenance must-dos. Gaskets/Front Main Seal/Rear Main Seal/Clutch You’ll need feeler gauges and shims for this job, much like the old racing engines from the DTM glory days. Our Valve Adjustment Kit has everything you need. It is recommended that a valve adjustment is performed roughly every 60k miles to prevent any valves from falling outside of their operational tolerance. A ‘drawback’ of the high-revving engine is that the lifters were designed similarly to older racing engines that use shims to set engagement points with the valves for correct operation. While most modern cars, or even cars of the same era as the E46, don’t require this kind of service, the S54 is a different breed. Stay ahead of this catastrophe with our BMW E46 M3 Dual VANOS service kit and VAC camshaft hubs. In simple terms, tabs on the camshaft hubs have a tendency to break off and find themselves in the timing chain, which can spell disaster for your engine. It is important to perform the VANOS service if you suspect your VANOS is failing, but it is also critical that you ensure the VAC updated VANOS camshaft hubs are included in that service.
VANOS units are a known issue for all BMWs of this era, but the S54 has a unique twist. VANOS, or basically BMW Vtech, is the variable valve timing system BMW uses to adjust cam and valve timing across the RPM range.
If the service happened at 50k miles, and your potential car has 90k miles, you’ll still need to do those rod bearings in roughly 60k miles. It is definitely something you need to look for if you are purchasing an E46 M3, but note the mileage. While they may last longer than the 100k mile interval outlined by BMW’s technical service bulletin update, a 100k mile service is imperative to keep your S54 happy and healthy. Even the best options, like our WPC Treated Rod Bearing Service Kit, for your E46 M3 isn’t a lifetime part. The rod bearing service, while critical, isn’t a permanent solution. That’s the part most owners and enthusiasts tend to forget. Unfortunately, the solution is effectively 100k mile rod bearing service. In short, BMW did not spec the rod bearing sizes correctly, which causes premature wear and eventual failure. If you are looking for an E46 M3, you’ve probably heard about the rod bearing issue. This article will help you understand what you might expect as a new E46 M3 owner or if your M3 is climbing to higher mileage as you enjoy it and what E46 parts you need to keep it reliable. Fortunately, those issues are well documented by now and the solutions are readily available, but they are issues all the same. Despite all those positives, and the 333bhp S54 power plant under the hood, they do suffer from some common issues. With a celebrated history, massive enthusiast community, and astounding aftermarket support, it has maintained relevance and still commands a premium price, even for SMG-equipped examples. The E46 M3 is considered the last analog M3 and is still used today as the benchmark quintessential sports car.
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