Three cars, three different diagnostic cases

Two BMWs and an Audi came to AutoChip from Saldus. The work used a dynamometer and data logs to compare measured output and assess each vehicle’s condition.

BMW E91 320d

On the original software, the dyno recorded 140 hp and 320 Nm, compared with the factory figures of 150 hp and 330 Nm cited in the video. After the Stage 1 software was written, the measured result was 185 hp and 405 Nm. Data logs revealed a turbo actuator issue that delayed turbo response at lower engine speeds. The owner planned to remove the turbocharger and have it repaired. The 195 hp and 415 Nm mentioned in the video are an adjusted estimate, not a measured result.

Audi Q5 2.0 TDI

The initial dyno run on the 2011 Audi Q5 showed around 132–133 hp and 305 Nm. After the software change, the measured result was 171 hp and 385 Nm. Engine data was monitored during the work, and the video says DPF and EGR operation was retained. At the same time, the readings suggested the DPF needed attention: 16 g of soot had accumulated around 150 km after the previous regeneration. A DPF repair is not shown in the video.

BMW E90 318d

Diagnostics found that the DPF had already been physically removed, but the software had not been adjusted to match. There were also EGR and MAF sensor problems. The original software produced 112 hp and 247 Nm on the dyno; after the reported software changes, the result was 137 hp and 328 Nm. The video mentions changes to DPF, EGR, MAF and throttle control.

These examples show why power measurements need to be considered alongside data logs and the vehicle’s mechanical condition. The turbocharger and DPF issues still required separate attention.