BHP+21 hp (10%)
Standard
204 hp
Tuned
225 hp
Torque+25 Nm (10%)
Standard
250 Nm
Tuned
275 Nm
Suitability
Moderate (4.5/10)Gains Profile
BalancedHeadroom
MediumBMW Z4 2.3i 204hp ECU Remapping
Considering an ECU remap for your BMW Z4 2.3i 204hp? A Stage 1 remap can take this E85 - 2003 - 2008 petrol engine from 204 BHP to 225 BHP and from 250 Nm to 275 Nm of torque (naturally aspirated). This engine scores 4.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your BMW Z4 can achieve.
How this engine compares
- 15thof 26 BMW Z4 engines by power gain
- 24%of the 9,842 engines we hold gain data for see a smaller power increase
- 14%of engines with torque data see a smaller torque increase
Comparisons are calculated from our own recorded Stage 1 figures.
Assessment
The BMW Z4 2.3i 204hp is a 2.5L naturally aspirated petrol engine producing 204 BHP and 250 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 225 BHP and 275 Nm — a gain of around 21 BHP (10%) and 25 Nm (10%).
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 moderate, 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 Z4 E85 - 2003 - 2008 Engines
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