Considering an ECU remap for your BMW 3 Series 323i 170hp? A Stage 1 remap can take this E46 - 1998 - 2005 petrol engine from 170 BHP to 185 BHP and from 245 Nm to 265 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 323i 170hp is a 2.5L naturally aspirated petrol engine producing 170 BHP and 245 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 185 BHP and 265 Nm — a gain of around 15 BHP (9%) and 20 Nm (8%).
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 limited, based on the percentage gain available from the factory output.
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 |
|---|---|---|---|---|---|
| 318D 115hp | 115 → 145 | +30 | 280 → 330 | +50 | Good (7.5/10) |
| 115 → 126 |
| +11 |
| 175 → 192 |
| +17 |
| Moderate (4/10) |
| 318i 118hp | 118 → 131 | +13 | 180 → 200 | +20 | Moderate (4.5/10) |
| 320D 136hp | 136 → 168 | +32 | 280 → 360 | +80 | Good (7.5/10) |
| 318i 136hp | 136 → 148 | +12 | 180 → 195 | +15 | Moderate (4/10) |
| 318i 143hp | 143 → 156 | +13 | 200 → 220 | +20 | Moderate (4/10) |
| 320D 150hp | 150 → 183 | +33 | 330 → 390 | +60 | Good (7.5/10) |
| 320i 150hp | 150 → 165 | +15 | 190 → 208 | +18 | Moderate (4/10) |
| 320i 170hp | 170 → 185 | +15 | 210 → 230 | +20 | Moderate (4/10) |
| 330D 184hp | 184 → 220 | +36 | 390 → 480 | +90 | Good (7.5/10) |
| 325i 192hp | 192 → 200 | +8 | 245 → 272 | +27 | Moderate (4/10) |
| 328i 193hp | 193 → 209 | +16 | 280 → 305 | +25 | Moderate (4/10) |
| 330D 193hp | 193 → 221 | +28 | 410 → 480 | +70 | Good (6.5/10) |
| 330D 204hp | 204 → 250 | +46 | 410 → 500 | +90 | Good (7.5/10) |
| 330i 231hp | 231 → 250 | +19 | 300 → 325 | +25 | Moderate (4/10) |
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.
