Data under review — The figures shown for this engine variant are currently being verified. They may be updated as we refine our data.
Considering an ECU remap for your BMW 1 Series M 135i 320hp? A Stage 1 remap can take this F20 - 2011 - 2015 petrol engine from 320 BHP to 385 BHP and from 450 Nm to 520 Nm of torque (naturally aspirated). This engine scores 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.
The BMW 1 serie M 135i 320hp is a 3.0L naturally aspirated petrol engine producing 320 BHP and 450 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 385 BHP and 520 Nm — a gain of around 65 BHP (20%) and 70 Nm (16%).
This engine has limited remap suitability, with gains weighted towards peak power — the improvement is most noticeable at higher RPM. 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.. 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.
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.
| Engine | BHP | Gain | Torque |
|---|
| Gain |
|---|
| Score |
|---|
| 114D 95hp (1598cc) | 95 → 140 | +45 | 235 → 320 | +85 | Excellent (8.5/10) |
| 114i 102hp | 102 → 210 | +108 | 180 → 310 | +130 | Good (6.5/10) |
| 116D 116hp (1598cc) | 116 → 140 | +24 | 260 → 320 | +60 | Excellent (8/10) |
| 116D 116hp (1995cc) | 116 → 190 | +74 | 260 → 400 | +140 | Excellent (8.5/10) |
| 116i 136hp | 136 → 210 | +74 | 220 → 310 | +90 | Good (6.5/10) |
| 118D 136hp | 136 → 190 | +54 | 320 → 400 | +80 | Excellent (8.5/10) |
| 118D 143hp | 143 → 190 | +47 | 320 → 400 | +80 | Excellent (8/10) |
| 120D 163hp | 163 → 220 | +57 | 380 → 440 | +60 | Good (7.5/10) |
| 118i (1600cc) 170hp | 170 → 210 | +40 | 250 → 310 | +60 | Moderate (5.5/10) |
| 120D 184hp | 184 → 220 | +36 | 380 → 440 | +60 | Good (7/10) |
| 120D 200hp | 200 → 220 | +20 | 420 → 440 | +20 | Moderate (5.5/10) |
| 125D 211hp (1995cc) | 211 → 270 | +59 | 450 → 500 | +50 | Good (7/10) |
| 125D 218hp (1995cc) | 218 → 270 | +52 | 450 → 500 | +50 | Good (7/10) |
| 125i 218hp | 218 → 270 | +52 | 310 → 440 | +130 | Good (6.5/10) |
| 125i MMP 238hp | 238 → 270 | +32 | 330 → 440 | +110 | Moderate (5.5/10) |
Get a personalised remap quote for your BMW 1 Series. We'll connect you with a trusted professional in your area.
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 before proceeding.
