Data under review — The figures shown for this engine variant are currently being verified. They may be updated as we refine our data.
BHP+74 hp (23%)
Standard
326 hp
Tuned
400 hp
Torque+130 Nm (29%)
Standard
450 Nm
Tuned
580 Nm
Suitability
Moderate (5.5/10)Gains Profile
BalancedHeadroom
HighBMW 3 Series 340i 326hp ECU Remapping
Considering an ECU remap for your BMW 3 Series 340i 326hp? A Stage 1 remap can take this F34 LCI - 2016 -> petrol engine from 326 BHP to 400 BHP and from 450 Nm to 580 Nm of torque (naturally aspirated). This engine scores 5.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW 3 Series can achieve.
How this engine compares
- 10thof 141 BMW 3 Series engines by power gain
- 93%of the 9,842 engines we hold gain data for see a smaller power increase
- 89%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
The BMW 3 serie 340i 326hp is a 3.0L naturally aspirated petrol engine producing 326 BHP and 450 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 400 BHP and 580 Nm — a gain of around 74 BHP (23%) and 130 Nm (29%).
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 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. at this torque level, transmission and driveline servicing history becomes especially important..
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.