BHP+16 hp (9%)
Standard
177 hp
Tuned
193 hp
Torque+25 Nm (11%)
Standard
230 Nm
Tuned
255 Nm
Suitability
Moderate (4/10)Gains Profile
BalancedHeadroom
LowBMW Z4 2.5i 177hp ECU Remapping
Considering an ECU remap for your BMW Z4 2.5i 177hp? A Stage 1 remap can take this E85 - 2003 - 2008 petrol engine from 177 BHP to 193 BHP and from 230 Nm to 255 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 Z4 can achieve.
How this engine compares
- 21stof 26 BMW Z4 engines by power gain
- 12%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 2.5i 177hp is a 2.5L naturally aspirated petrol engine producing 177 BHP and 230 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 193 BHP and 255 Nm — a gain of around 16 BHP (9%) and 25 Nm (11%).
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.
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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