"Is the 5 Serisi 525d reliable, and what should you check?"
The most frequently mentioned issue when buying a used BMW 5 Series 525d 2013 (F07 / F10 / F10M / F11): Oil leakage from the valve cover contaminates the DPF. Additionally, DPF clogging and failed regeneration are also commonly reported.
Engine: N47
N47D20D · 525d · Used in this car from 2012-2017
Strengths
Wide selection of versions and modifications
Economical for such power output
Watch-outs
Many problems with early diesel versions
Frequent oil leaks
Many versions have piezo injectors
Known engine issues
Timing chain driveEarly engines had low timing chain lifespan: guides wore out, chains stretched, and sharp teeth on the crankshaft sprocket accelerated the process. On updated N47TU or N47N engines, most weak points were eliminated.
Cracks in the blockThe aluminum block was initially designed without a special safety margin, and severe overheating could cause cracks between the second and third cylinders. With the update, the block was reinforced and such problems almost ceased.
Fuel systemAll engines in this series are equipped with a reliable Bosch Common Rail fuel system, but powerful versions with piezo injectors are quite demanding on fuel quality. Also, avoid driving with an empty tank, as the high-pressure pump may suck in air and start producing metal shavings.
Listed from most frequently reported, each with its source.
Oil leakage from valve cover contaminates DPF
Often reported
Oil leakage from the valve cover or gaskets can drip onto the exhaust system and DPF, causing smoke, filter clogging, and potentially expensive repairs.
Engine Bay
DPF clogging and failed regeneration
Often reported
The 3.0 diesel engine (N57) in the F10 LCI may experience incomplete or impossible DPF regenerations, leading to soot buildup and a fault code that prevents regeneration, even forced regeneration cannot be performed. More common in used vehicles.
Exhaust Emissions
EGR valve and EGR cooler clogging and failure
Often reported
The EGR valve and circuit (including EGR cooler) in the 3.0 N57 are prone to soot deposits and blockages, reducing their operation, worsening engine behavior, and potentially increasing DPF regeneration and emission issues.
What should I look for when buying a BMW 5 Series 525d?+
When buying a 2013 model 525d, check the service history, test drive, and engine/transmission warnings. The most commonly reported issues: oil leakage from the valve cover contaminating the DPF; DPF clogging and failed regeneration; EGR valve and EGR cooler clogging and failure.
What are the chronic problems of the BMW 5 Series 525d?+
The most commonly reported issues: oil leakage from the valve cover contaminating the DPF; DPF clogging and failed regeneration; EGR valve and EGR cooler clogging and failure.
Is the BMW 5 Series 525d reliable?+
Instead of a simple yes/no, it's necessary to evaluate the proven pros and cons together. This page lists 4 verified findings.
How does Carbeak collect data?+
The cards on this page are derived from the Difetti fault database records; the source vehicle is matched to the target vehicle by brand, fuel type, engine, and generation. Topics with insufficient evidence are not shown.