BHP+12 hp (7%)
Standard
173 hp
Tuned
185 hp
Torque+20 Nm (10%)
Standard
200 Nm
Tuned
220 Nm
Suitability
Moderate (4/10)Gains Profile
Torque-focusedHeadroom
LowBMW 3 Series 320si 173hp ECU Remapping
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.
How this engine compares
- 135thof 141 BMW 3 Series engines by power gain
- 7%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 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.
Considerations
!Naturally aspirated engine: gains are usually limited; results vary widely.
Other 3 Series E90/E91 - 2005 - 2010 Engines
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