BHP+29 hp (9%)
Standard
306 hp
Tuned
335 hp
Torque+50 Nm (11%)
Standard
450 Nm
Tuned
500 Nm
Suitability
Moderate (4.5/10)Gains Profile
BalancedHeadroom
MediumBMW 1 Series M135i 306hp ECU Remapping
Considering an ECU remap for your BMW 1 Series M135i 306hp? A Stage 1 remap can take this F40 - 2019 -> petrol engine from 306 BHP to 335 BHP and from 450 Nm to 500 Nm of torque (naturally aspirated). This engine scores 4.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW 1 Series can achieve.
How this engine compares
- 58thof 68 BMW 1 Series engines by power gain
- 38%of the 9,842 engines we hold gain data for see a smaller power increase
- 27%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
The BMW 1 serie M135i 306hp is a 2.0L naturally aspirated petrol engine producing 306 BHP and 450 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 335 BHP and 500 Nm — a gain of around 29 BHP (9%) and 50 Nm (11%).
This engine has limited 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 transmission is many variants use zf 8-speed automatic (where fitted); manuals also exist. at this torque level, transmission and driveline servicing history becomes especially important..
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. High tuned torque: check transmission torque capacity and service history.
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.
!High tuned torque: check transmission torque capacity and service history.