Data under review — The figures shown for this engine variant are currently being verified. They may be updated as we refine our data.
BHP+66 hp (36%)
Standard
184 hp
Tuned
250 hp
Torque+140 Nm (47%)
Standard
300 Nm
Tuned
440 Nm
Suitability
Good (6.5/10)Gains Profile
Torque-focusedHeadroom
HighBMW 4 Series 420i 184hp ECU Remapping
Considering an ECU remap for your BMW 4 Series 420i 184hp? A Stage 1 remap can take this G22 - 2020 - 2024 petrol engine from 184 BHP to 250 BHP and from 300 Nm to 440 Nm of torque (naturally aspirated). This engine scores 6.5/10 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
- 3rdof 52 BMW 4 Series engines by power gain
- 90%of the 9,842 engines we hold gain data for see a smaller power increase
- 91%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 420i 184hp is a 2.0L naturally aspirated petrol engine producing 184 BHP and 300 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 250 BHP and 440 Nm — a gain of around 66 BHP (36%) and 140 Nm (47%).
This engine has moderate remap suitability, with gains weighted towards torque — you will notice the difference most strongly in mid-range pulling power and in-gear acceleration. The tuning headroom is classified as high, based on the percentage gain available from the factory output.
From a technical perspective, the transmission is many variants use zf 8-speed automatic (where fitted); manuals also exist..
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. Unusually high gain for NA engine: treat as an estimate and verify against the exact engine variant.. High tuned torque: check transmission torque capacity and service history.. Large torque increase: drivetrain condition (clutch/gearbox) becomes more important at this level.
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
!Naturally aspirated engine: gains are usually limited; results vary widely.
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