BHP+36 hp (20%)
Standard
184 hp
Tuned
220 hp
Torque+60 Nm (16%)
Standard
380 Nm
Tuned
440 Nm
Suitability
Good (7/10)Gains Profile
BalancedHeadroom
MediumBMW 4 Series 420d 184hp ECU Remapping
Considering an ECU remap for your BMW 4 Series 420d 184hp? A Stage 1 remap can take this F32/33 - May/2016 - 2019 diesel engine from 184 BHP to 220 BHP and from 380 Nm to 440 Nm of torque (turbocharged). This engine scores 7/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW 4 Series can achieve.
How this engine compares
- 35thof 52 BMW 4 Series engines by power gain
- 60%of the 9,842 engines we hold gain data for see a smaller power increase
- 41%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
The BMW 4 serie 420d 184hp is a 2.0L turbocharged diesel engine producing 184 BHP and 380 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 220 BHP and 440 Nm — a gain of around 36 BHP (20%) and 60 Nm (16%).
This engine has moderate remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as moderate, based on the percentage gain available from the factory output.
From a technical perspective, the ECU is typically a Bosch EDC17 (likely), and the transmission is many variants use zf 8-speed automatic (where fitted); manuals also exist..
Considerations: High tuned torque: check transmission torque capacity and service history.
Fuel economy note: possible improvement with conservative driving.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
Considerations
!High tuned torque: check transmission torque capacity and service history.