Audi Diesel: Common Rail Technology Explained

Translated on 22-10-2026, 5:01.

Hello,

Can anyone tell me when Audi started using 4-cylinder engines with common rail injection? Ideally, with the chassis number (A4 Avant) or engine code. The search function didn't provide any results on this topic.

Best regards,
Hans.

Translated on 22-10-2026, 5:02.

To my knowledge, the A4 B8 only came with common-rail engines from the start of production (SOP), while the B7 models only used pump-injector technology for the 4-cylinder engines.