bmw 335 reliability

BMW 335d Reliability (Solved & Explained)

How reliable is the BMW’s 335 diesel engine, is a valid question for the buyer in the market for a BMW, preowned or brand new. Apart from the elegance and comfort, you get from the BMW you want to know how long it is going to last you. and in this article will take a look at the 335D reliabilty.

In short, the 335D  is a solid and reliable car with generally a good record of accomplishment and could possibly last you a very long time with no issues, on average you can go 250 000 miles before experiencing any issues.

These are the issues that make and keep this model a top option for any BMW fan. Knowing how far the car take you, what kind of condition it will be in for any duration and what you can do to get the best out of it. These seem to be the guidelines govern the vehicle’s reliability overall.

Background of the 335d Engine

The 335d can do 0 to 60 in 5.7 seconds blowing away any preconceptions of diesel engines being slow. You only need to experience the drive to appreciate the speed and handling of the vehicle. It is an automatic transmission that can save you a penny from your fuel budget.

How Much Mileage Can the 335d Give You?

The BMW 335d can do 200 000+ miles with little to no major issues. For the average driver that would mean the car can last you more than 15 years. That’s an average of about 12 000 miles of driving per year; which seems a little higher than the standard commute for most of us.


Maintenance of a 335d

For your vehicle to last as long as possible, the normal regular check-ins are necessary but for the 335d to extend its reliable performance consider changing your battery every 3 to 5 years. And at more than 75 000 miles change to high mileage motor oil, which services the unique needs of a vehicle that’s lasted so long.

Changing the thermostat between 80-100k miles is advisable as this is a range within which they can fail. This failure can result in the diesel engine failing to get up to temperature especially in the winter seasons. Any lights turning on, on the dashboard should be addressed immediately.

Not taking note and fixing such problems can cause the development of problems and failure of other systems. Hence when your BMW shows there is an issue it is best to fix it when it is less expensive and with a degree of urgency.

Problems Associated With the 335D

  • EGR system failure
  • SCR system issues
  • DPF failure These tend to be problems that start to turn up after the vehicle has over 200 000 miles. And in the case of the SCR system, due to its design, the issue can get really costly. And for problems like the
  • EGR system, these are a regional issue that also has to do will the quality of fuel used in the car as well. The problems do not exist to an extent that the car has lost popularity in the public eye. On the contrary, while it is an irritation that few have faced, the general sentiment remains positive as to the reliability of the 335d.


For the car to last longer it will need a DPF delete that is the process of removing the car’s DPF and configuring it to function without it. Since tend to go bad at about 120k miles.

In addition, look at removing SCR and the DEF system as well. The 355d is known to have carbon build-up issues and it is best to have the EGR system removed as well.

Including getting rid of the cooler and replacing it with a race pipe because the cooler will eventually start leaking. With all that done get the car tuned. You will also need to do a transmission oil change every 75k miles. So changing the fluid and the filter.

Delays in fixing the fluid issue can result in the mechatronic sleeve acting up but if you fix the oil replacement issue repairing the sleeve will not be that expensive.

Swirl flaps are small butterfly valves located within the inlet manifold on modern diesel and petrol engines, they are designed to help regulate the fuel to air ratio, improve emissions and help generate better torque at low engine speeds.

They need to be deleted after 150 000 miles as they stop to functioning properly. Effecting a thermostat and Harmonic Balancer change when you’re up in those high mileages so you do find your vehicle unable to pull enough power or stalling on you.

The few modifications speak to the general reliability of the vehicle, as you would need these on average at over 90 000 miles. Moreover, the few changes can have you in the BMW 335d for more than 300 000 miles more. With good fuel efficiency, a great look, a comfortable drive this version of the BMW is very reliable and worth the consideration every time.


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