BHP+15 hp (9%)
Standard
170 hp
Tuned
185 hp
Torque+20 Nm (8%)
Standard
245 Nm
Tuned
265 Nm
Suitability
Moderate (4/10)Gains Profile
BalancedHeadroom
LowBMW 3 Series 323i 170hp ECU Remapping
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.
How this engine compares
- 124thof 141 BMW 3 Series engines by power gain
- 9%of the 9,842 engines we hold gain data for see a smaller power increase
- 8%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 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.
Considerations
!Naturally aspirated engine: gains are usually limited; results vary widely.
Other 3 Series E46 - 1998 - 2005 Engines
| Engine | BHP | Gain | Torque | Gain |
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