Considering an ECU remap for your BMW Z4 30i 258hp? A Stage 1 remap can take this G29 - 2019 -> petrol engine from 258 BHP to 278 BHP and from 400 Nm to 450 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.
The BMW Z4 30i 258hp is a 2.0L naturally aspirated petrol engine producing 258 BHP and 400 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 278 BHP and 450 Nm — a gain of around 20 BHP (8%) and 50 Nm (12%).
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 moderate, based on the percentage gain available from the factory output.
From a technical perspective, the transmission is many variants use zf 8-speed automatic (where fitted); manuals also exist. at this torque level, transmission and driveline servicing history becomes especially important..
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. High tuned torque: check transmission torque capacity and service history.
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 |
|---|---|---|---|---|---|
| 20i 197hp |
| 197 → 250 |
| +53 |
| 320 → 440 |
| +120 |
| Good (6.5/10) |
| M40i 340hp | 340 → 400 | +60 | 500 → 580 | +80 | Moderate (5/10) |
Get a personalised remap quote for your BMW Z4. 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.
