Considering an ECU remap for your BMW 3 Series 320si 173hp? A Stage 1 remap can take this E90/E91 - 2005 - 2010 petrol engine from 173 BHP to 185 BHP and from 200 Nm to 220 Nm of torque (naturally aspirated). This engine scores 4/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW 3 Series can achieve.
The BMW 3 serie 320si 173hp is a 2.0L naturally aspirated petrol engine producing 173 BHP and 200 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 185 BHP and 220 Nm — a gain of around 12 BHP (7%) and 20 Nm (10%).
This engine has limited 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 limited, based on the percentage gain available from the factory output.
From a technical perspective, the transmission is many variants use zf 5/6-speed automatics (where fitted); manuals also exist..
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.
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 |
|---|---|---|---|---|---|
| 316D 115hp | 115 → 180 | +65 | 260 → 400 | +140 | Excellent (8/10) |
| 316i 122hp | 122 → 136 | +14 | 160 → 177 | +17 | Moderate (4.5/10) |
| 318D 122hp | 122 → 155 | +33 | 280 → 340 | +60 | Good (7.5/10) |
| 318D 136hp | 136 → 180 | +44 | 300 → 390 | +90 | Excellent (8/10) |
| 318D 143hp | 143 → 180 | +37 | 300 → 390 | +90 | Good (7.5/10) |
| 318i 143hp | 143 → 157 | +14 | 190 → 216 | +26 | Moderate (4.5/10) |
| 320D 150hp | 150 → 200 | +50 | 330 → 400 | +70 | Good (7.5/10) |
| 320i 150hp | 150 → 175 | +25 | 200 → 215 | +15 | Moderate (4.5/10) |
| 320D 163hp | 163 → 215 | +52 | 350 → 420 | +70 | Good (7.5/10) |
| 320i 163hp | 163 → 175 | +12 | 200 → 220 | +20 | Moderate (4/10) |
| 320i 170hp | 170 → 182 | +12 | 210 → 230 | +20 | Moderate (4/10) |
| 325D 177hp | 177 → 214 | +37 | 400 → 452 | +52 | Good (6.5/10) |
| 320D 177hp | 177 → 215 | +38 | 350 → 420 | +70 | Good (7.5/10) |
| 325D 197hp | 197 → 233 | +36 | 400 → 490 | +90 | Good (7.5/10) |
| 325i - N52 - 211hp | 211 → 232 | +21 | 250 → 275 | +25 | Moderate (4/10) |
| 325i - N53 - 211hp | 211 → 265 | +54 | 270 → 315 | +45 | Moderate (5.5/10) |
| 330D 211hp | 211 → 270 | +59 | 500 → 595 | +95 | Good (7.5/10) |
| 325i - N53 - 218hp | 218 → 265 | +47 | 270 → 315 | +45 | Moderate (5/10) |
| 325i - N52 - 218hp | 218 → 232 | +14 | 250 → 275 | +25 | Moderate (4/10) |
| 328i 230hp | 230 → 274 | +44 | 300 → 325 | +25 | Moderate (4.5/10) |
| 330D 231hp | 231 → 275 | +44 | 500 → 620 | +120 | Good (7.5/10) |
| 330D 245hp | 245 → 300 | +55 | 520 → 600 | +80 | Good (6.5/10) |
| 330i 258hp | 258 → 274 | +16 | 300 → 325 | +25 | Moderate (4/10) |
| 330i 272hp | 272 → 292 | +20 | 320 → 340 | +20 | Moderate (4/10) |
| 335D 286hp | 286 → 350 | +64 | 580 → 680 | +100 | Good (6.5/10) |
| 335D 306hp | 306 → 340 | +34 | 600 → 680 | +80 | Good (6/10) |
| 335i - N54 - 306hp | 306 → 370 | +64 | 400 → 500 | +100 | Good (7.5/10) |
| 335i - N55 Twinscroll - 306hp | 306 → 360 | +54 | 400 → 520 | +120 | Good (7/10) |
| 335i - N54 PPK - 326hp | 326 → 370 | +44 | 450 → 500 | +50 | Good (6/10) |
| M3 420hp | 420 → 440 | +20 | 400 → 430 | +30 | Limited (3.5/10) |
Get a personalised remap quote for your BMW 3 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.
