Whirlpool water filter ro 375

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So yeah, as the title says, I bought my E92 330i (09/2009) a year ago and I want to reflect on my year of ownership. I want to share all the maintenance that was done, my driving experience, and observations.
From the start, I knew that it wouldn’t be easy to maintain the car. It's powered by the N53B30 (200 kW) engine, which many people are not fond of. My ideal pick would be the N52B30 200 kW variant, but sadly, that was not widely available in Europe for the E92 model.
General observation
Let’s get to the point. If you are considering buying this car, make sure it has undergone proper maintenance first. Don’t gamble with models that have a shady maintenance history. If you are living in Europe, especially in the former "Ost blok," don’t buy this car in your country unless you have 100% service documentation from the previous owner. Back in the day, for the price of this car, you could buy one or two nice apartments in the capital (Bratislava). There simply weren’t enough people buying these cars in this part of Europe who could afford them. Nowadays, most of the E9x models are imported from Western Europe. Although the prices of the cars have significantly dropped, the cost of maintenance remains the same. Even with today’s salaries in this part of Europe, people can’t afford to maintain these vehicles properly. This leads to neglecting service intervals, using cheap aftermarket parts instead of OE/OEM ones, and not using the correct fuel, etc. Buying this kind of vehicle from, let’s say, Germany isn’t always the ideal solution, but at least people have higher purchasing power and can spend more on properly maintaining the car.
My experience
I bought my E92 with 218,000 km (~135,769.606 miles) in April 2023. I immediately fell in love with the car; despite the electric steering, the vehicle felt great. The acceleration, thanks to the last naturally aspirated N53 engine, felt powerful, linear, and willing to chase the red line every time I stepped on the gas. Thanks to direct injection, the fuel consumption was also solid. Driving according to the speed limit could get me way below 8.5l/100 km (27.67 mpg), usually between 7.5 - 8.3l/100km (31.69 - 28.33 mpg), which is an amazing value for a 3L 200 kW engine. The shape of the chassis is timeless, adorned by beautiful angel eyes and a long bonnet. The full leather interior with memory sport seats looks and feels brand new. The manual 6-speed transmission with a classical analog speedometer with an orange backlight is a work of art. Despite being a coupe, the car provides two fully functional back seats with enough legroom for even a 1.9-meter-tall person. Individual anthracite upholstery with beautiful black velour floor mats is just a nice bonus on top of this.
The fuel system and the engine
The biggest downside of this car is definitely the expensive high-pressure fuel system: pricey index 12 fuel injectors with NOx sensors and catalytic converters. Although direct injection enables you to drive very economically, it can cause problems. The engine can run in three different modes (stratified charge, homogeneous lean charge, and homogeneous charge mode). This can be discussed on many pages, but the long story short is: if you have any issue with the combustion system, ranging from spark plugs, coils, injectors, NOx sensor, or catalytic converters, you will lose the benefit of fuel consumption and run a very lean mixture, having the consumption of an N52. People (mainly from the US) complain about the high-pressure fuel pump, which can give up and destroy your €2500 injectors and fuel lines. You can more or less avoid this by using premium fuels (98/100 octane and higher) with cleaning additives (this will also help by removing carbon buildup). You should also expect to change your oil every 8000 - 10,000 km and no more. The N53 runs very hot; it is not uncommon for the oil temperature in the engine to reach 120°C when driving dynamically. You don’t want any burned oil slugs in the gasket, which can damage the timing chain and VANOS units. Also, the engine, thanks to the direct injection system, is quite noisy at idle (similar to diesel) and isn’t as silky smooth as the N52 or the M54 engines. Another topic is the water pump, which according to many, tends to fail. I had mine preventively replaced at 238,026 km. I didn’t notice any issues with it or the HPFP. Also, don’t forget to inspect/replace the DISA flaps; those can cause catastrophic engine damage if they are sucked into the cylinders.
Conclusion
Despite the mentioned issues, the engine can be very reliable and giving. My one year of maintenance was quite pricey. This could have been avoided if the previous owner had done some preventative maintenance. Sadly, he only replaced the clutch and spark plugs. However, one thing BMW really nailed with this engine was the timing chain. I still run on the original one (no knocking or loose chain whatsoever), and I’m planning to replace it before reaching the 300k km mark. If you have any remarks, feel free to ask. I’m also posting the maintenance that was done during my ownership. The prices include tax and labor. I serviced the car only with original parts at an authorized dealership.
Maintenance
May 2023 - 220 577 km - €322.90

• Brake fluid
• Door insulation

June 2023 - 222 318 km - €1,090.69

• Air Filter
• Oil change
• Cabin filter
• Spark plugs
• Manual transmission oil
• Differential oil
• Auto battery

August 2023 - 226 084 km - €1,886.79

• NOx sensor change
• Valve cover gasket replacement

September 2023 - 227 365 km - €1,081.18

• DISA flaps
• Serpentine belt + pulleys

October 2023 - 228 649 km - €2,885.71

• Fuel injectors
• Oil change

March 2024 - 234 277 km - €1,247.60

• High pressure fuel pump
• Coolant replacement

April 2025 - 238 026 km - €1,299.42

• Water pump
• Oil change

Total cost €9,808.23

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