Considering an ECU remap for your Audi A4 2.5 TDI 155hp? A Stage 1 remap can take this B6 - 2001 - 2004 diesel engine from 155 BHP to 190 BHP and from 310 Nm to 390 Nm of torque (turbocharged). This engine scores 7.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Audi A4 can achieve.
The Audi A4 2.5 TDI 155hp is a 2.5L turbocharged diesel engine producing 155 BHP and 310 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 190 BHP and 390 Nm — a gain of around 35 BHP (23%) and 80 Nm (26%).
This engine scores highly for 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 high, based on the percentage gain available from the factory output.
From a technical perspective, the ECU is typically a Bosch EDC15 (likely), and the transmission is manual and dsg/s tronic automatics are common depending on model/engine..
Considerations: Large torque increase: drivetrain condition (clutch/gearbox) becomes more important at this level.. Older diesel: injector, turbo and intake condition can affect results; ensure maintenance is up to date.
Fuel economy note: possible improvement with conservative driving.
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 |
|---|
| 1.9 TDI 100hp | 100 → 140 | +40 | 240 → 320 | +80 | Excellent (8/10) |
| 1.6i 102hp | 102 → 112 | +10 | 148 → 163 | +15 | Moderate (4/10) |
| 1.9 TDI 115hp | 115 → 145 | +30 | 285 → 350 | +65 | Good (7.5/10) |
| 1.9 TDI 130hp | 130 → 170 | +40 | 310 → 390 | +80 | Good (7.5/10) |
| 2.0i 130hp | 130 → 140 | +10 | 195 → 210 | +15 | Moderate (4/10) |
| 1.8T 20v 150hp | 150 → 192 | +42 | 210 → 310 | +100 | Excellent (8/10) |
| 2.0 FSI 150hp | 150 → 160 | +10 | 200 → 215 | +15 | Moderate (4/10) |
| 1.8T 20v 163hp | 163 → 200 | +37 | 225 → 320 | +95 | Excellent (8/10) |
| 2.5 TDI 163hp | 163 → 190 | +27 | 350 → 390 | +40 | Good (6.5/10) |
| 2.5 TDI 180hp | 180 → 210 | +30 | 370 → 420 | +50 | Good (6.5/10) |
| 1.8T 20v 190hp | 190 → 220 | +30 | 240 → 340 | +100 | Good (7.5/10) |
| 3.0 V6 220hp | 220 → 235 | +15 | 300 → 320 | +20 | Moderate (4/10) |
Get a personalised remap quote for your Audi A4. 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.
