What does the system do?
Secondary air supplies fresh air to the exhaust during cold start, supporting oxidation and catalyst warm-up. Pump, valves and lines form one system.
Additional options explained
SAP – Secondary-air system
Why secondary air is used after a cold start, which components are involved and what the SAP option refers to.
Illustrative imagery, partly AI-generated. Components and their arrangement vary between vehicles.
Function, changes and requirements
What does the option mean?
The option concerns its control and diagnostics. A change can affect cold-start emissions and does not fix leaking valves or pump damage.
What do we check on your vehicle?
We inspect airflow, valve sealing, relays, lines and the cause of pump failure before defining the scope. The exact control unit, software version, fitted hardware and intended use determine the scope. A configurator entry does not replace this assessment.
Frequently asked questions
Does every vehicle support this function?
No. We check the vehicle, control unit and software against the actual supported function. Include existing faults and modifications. Transmission functions also require the exact gearbox version.
Does selecting an option approve its use?
No. Changes to emissions, noise or protection functions can affect legal use and operating safety. This page promises no road approval; diagnosis and a permissible repair are considered first.
Explore your next step
A better drive. With the right software.
Custom ECU calibration and professional file service directly from RG-Racing.
Learn more →Diagnostics and software analysis from one source
Send a photo of the message and any fault codes. We review the information and discuss what should be checked next.
Learn more →Does this option suit your project?
Tell us the vehicle, engine, gearbox, modifications and your goal. We clarify the precise scope before preparing an offer.
Enquire about this option →