Vauxhall Astra 1.8i 16v 125bhp tuning file
(G) (1998–2004) · Petrol · ECU: Siemens/Continental SIMTEC 71 / Siemens/Continental SIMTEC 90
Stage 1 remap: +10 bhp & +25 Nm
ECU
Read methods
Available solutions
Upload the original read of your Vauxhall Astra 1.8i 16v 125bhp and we'll return a Stage 1 tuning file worth 135 bhp and 195 Nm – up from 125 bhp and 170 Nm, an increase of +10 bhp (8%) and +25 Nm. Every file is checked by a calibrator on the Siemens/Continental SIMTEC 71 / Siemens/Continental SIMTEC 90 before release, and DPF / EGR solutions can be combined in one upload.
Who is this remap for?
Naturally aspirated petrol engines gain less than turbo engines, but a remap still improves throttle response and smooths out flat spots in the power delivery. 125 → 135 bhp equals roughly 93 → 101 kW.
Figures are guide values from our rolling road and comparable vehicles. Results depend on the vehicle's condition, hardware and fuel quality. Remapping in the UK: let your insurer know about the modification. DPF, EGR and AdBlue solutions are supplied for off-road and motorsport use only and are not legal for use on UK roads.
Engine specification
| Fuel type | Petrol |
| Engine size | 1796 CC |
| Compression ratio | 10.5 : 1 |
| Bore × stroke | 80.5 X 88.2 mm |
| Engine code | Z18XE |
Other Vauxhall Astra (G) (1998–2004) engines
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