The 2007 Bmw 335i, a popular model from the E90 generation, is known for its impressive performance thanks to its twin-turbocharged N54 engine. However, like any vehicle, especially one of this age, there are specific maintenance points and potential issues that owners and prospective buyers should be aware of. This article dives into the typical problems you might encounter with a 2007 BMW 335i, offering insights for those looking to own or maintain this iconic sports sedan.
Turbochargers: Robust but Not Invincible
One of the biggest draws of the 335i is its turbocharged engine. Contrary to some concerns, turbocharger failure isn’t a widespread issue for the 2007 model. The original poster noted “No turbo issues what so ever,” which aligns with general owner experiences. While turbos are generally robust, they are complex components and can eventually require attention, especially on higher mileage cars. If replacement becomes necessary, the cost can be around $2,500. Regular oil changes with high-quality synthetic oil are crucial for turbo longevity.
Fuel Injectors: Less Problematic Than Later Models
Fuel injector problems are often discussed in relation to BMW 335i models. Interestingly, the 2007 335i seems to experience fewer injector issues compared to later N54 and even some N55 engine variants. The original post states “No injectors issues what so ever and by the way 328’s have a lot more injector issues as do newer 335’s not specific to an 07.” While this is anecdotal, it suggests that the early 335i might be less prone to injector failures. However, injectors can still fail over time, and replacement costs can be around $1,000. Symptoms of failing injectors include rough idling, misfires, and fuel leaks.
High-Pressure Fuel Pump (HPFP): Recall Resolved
The High-Pressure Fuel Pump (HPFP) was a known weak point in early N54 engines and led to a significant recall. BMW addressed this issue with an extended warranty for 10 years/120,000 miles on the HPFP. The original author mentions, “All 335’s were called in for the latest fuel pump. Never had in issue with either the old one or replacement on.” This indicates that most 2007 335i models should have had the HPFP replaced under recall. If not, or if a replacement fails outside the warranty period, it’s something to be aware of.
Carbon Build-Up on Intake Valves: A Direct Injection Reality
Carbon build-up on the intake valves is a common issue in direct injection engines, including the N54 in the 2007 BMW 335i. Unlike port injection engines, direct injection systems don’t spray fuel across the intake valves, leading to carbon deposits forming over time. The original post confirms this: “Yes had my intake valves done at 61K miles. Because this is a direct injection engine all 335’s have this issue.” This carbon build-up can reduce performance and fuel economy. Intake valve cleaning, such as walnut blasting, is a necessary maintenance item, typically required every 50,000 to 70,000 miles.
Oil Filter Housing Gasket (OFHG): A Common BMW Leak
The Oil Filter Housing Gasket (OFHG) leak is a very common issue across various BMW models, including the 2007 335i. The original author mentions, “Yes OFHG did myself around 58K miles Oil filter gasket.” This gasket tends to harden and leak over time due to heat cycling. It’s a relatively inexpensive part but can be labor-intensive to replace. Look for oil leaks around the oil filter housing as an indicator.
Water Pump and Thermostat: Preventative Maintenance
The water pump and thermostat are known failure points in BMWs around the 60,000 to 80,000 mile mark. The original poster proactively replaced theirs at 62,000 miles: “Replaced based on years and mileage no failure of either 62K miles Parts were 440 bucks by the way all BMW Water pump/thermo (600 parts only).” While not always failing exactly at this mileage, preventative replacement around this interval is a wise move to avoid potential overheating.
Belt Tensioners: Routine Replacement
Belt tensioners are wear items that should be replaced periodically. The original author plans to replace them at 100,000 miles: “Nope no issues what so ever but will change them at 100K miles Belt tensioners.” Replacing belt tensioners and belts at recommended intervals prevents belt failure and potential damage to other components.
DSC System (ABS/Brake Module): Potential Electronic Issue
The Dynamic Stability Control (DSC) system, which includes the ABS and brake module, can experience issues. The problem often lies with the Bosch DC electric motor within the module. The original poster details a DIY fix and mentions Modulemasters.com for repairs: “It isn’t the DSC it is the Bosch DC electric motor… Modulemasters.com repairs these for 250 bucks. I rebuilt mine for nothing…” DSC issues can manifest as warning lights on the dashboard and affect braking and stability control systems.
Conclusion: Age and Mileage Are Factors, But Maintenance is Key
The 2007 BMW 335i, while potentially having some common issues, is generally a reliable and rewarding car to own, especially when properly maintained. As the original poster concludes, “There is no hard and fast rule as to what is to be replaced or will fail with few exceptions like the water pump and tstat, OFHG, maybe the DSC…” Instead of fearing high mileage examples, consider a 2007 335i that has had these common issues addressed and has a documented maintenance history. A well-maintained higher mileage car can often be a better choice than a low-mileage example that has deferred maintenance. When considering a 2007 BMW 335i, focus on its service history and evidence that preventative maintenance and common issues have been addressed to ensure a more enjoyable ownership experience.
