Considering an ECU remap for your BMW 1 Series 123D 204hp? A Stage 1 remap can take this E87 - 2007 - 2011 diesel engine from 204 BHP to 245 BHP and from 400 Nm to 450 Nm of torque (turbocharged). 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 1 Series can achieve.
Comparisons are calculated from our own recorded Stage 1 figures.
The BMW 1 serie 123D 204hp is a 2.0L turbocharged diesel engine producing 204 BHP and 400 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 245 BHP and 450 Nm — a gain of around 41 BHP (20%) and 50 Nm (12%).
This engine has moderate 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 ECU is typically a Bosch EDC16 (likely), and the transmission is many variants use zf 5/6-speed automatics (where fitted); manuals also exist. at this torque level, transmission and driveline servicing history becomes especially important..
Considerations: High tuned torque: check transmission torque capacity and service history.. Older diesel: injector, turbo and intake condition can affect results; ensure maintenance is up to date.
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.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| 116D 115hp | 115 → 180 | +65 | 260 → 390 | +130 | Excellent (8/10) |
| 116i 122hp | 122 → 135 | +13 | 160 → 185 | +25 | Moderate (4.5/10) |
| 118D 136hp | 136 → 180 | +44 | 300 → 390 | +90 | Excellent (8/10) |
| 118D 143hp | 143 → 180 | +37 | 300 → 390 | +90 | Good (7.5/10) |
| 118i 143hp | 143 → 155 | +12 | 190 → 208 | +18 | Moderate (4/10) |
| 120D 163hp | 163 → 215 | +52 | 340 → 420 | +80 | Good (7.5/10) |
| 120i 170hp | 170 → 185 | +15 | 210 → 230 | +20 | Moderate (4/10) |
| 120D 177hp | 177 → 215 | +38 | 350 → 420 | +70 | Good (7.5/10) |
| 125i 218hp | 218 → 250 | +32 | 270 → 310 | +40 | Moderate (4.5/10) |
| 130i 265hp | 265 → 285 | +20 | 315 → 340 | +25 | Moderate (4/10) |
| 135i - N54 306hp | 306 → 362 | +56 | 400 → 510 | +110 | Good (7/10) |
| 135i - N55 - twinscroll 306hp | 306 → 365 | +59 | 400 → 520 | +120 | Good (7/10) |
| 1M - 3.0i Bi-turbo 340hp | 340 → 375 | +35 | 500 → 560 | +60 | Good (6/10) |
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.
