Audi issued a recall for specific models due to a software glitch in the secondary air pump system. The error caused improper pressure regulation during cold starts, potentially leading to component overheating or engine compartment fires. Audi identified the issue through warranty claims and diagnostic reports, prompting corrective software updates to ensure compliance with emissions and safety standards.
Which Audi Models Are Affected by the Air Pump Software Recall?
Affected vehicles include 2018-2022 Audi A4, A5, Q5, and certain S-Line variants equipped with 2.0L TFSI engines. Audi’s VIN lookup tool enables owners to verify inclusion in recall campaign 69AQ. The software flaw specifically impacts vehicles produced between March 2017 and November 2021 at Audi’s Ingolstadt and Neckarsulm assembly plants.
| Model | Production Years | Engine Code |
|---|---|---|
| A4 Sedan | 2018-2022 | EA888 Gen3 |
| Q5 SUV | 2019-2021 | CYMC/CYRB |
How Does Audi’s Software Update Resolve the Air Pump Defect?
Dealers apply a revised engine control module (ECU) calibration (SW version 8W0906259H) that modifies the air pump activation sequence. The update reduces maximum duty cycle from 95% to 82%, introduces temperature-based runtime limits, and adds new diagnostic protocols. This technical bulletin (TPI 2055895/4) requires 45 minutes of shop time using ODIS diagnostic systems.
The enhanced software algorithm now monitors real-time thermal conditions through multiple sensor inputs, including intake air temperature and coolant readings. During sub-zero starts, the system initiates a staggered activation pattern that prevents continuous pump operation beyond safe thresholds. Audi engineers conducted 2,400 hours of bench testing to validate the new parameters, simulating extreme weather conditions from -30°C to +50°C. Post-update vehicles show 92% reduction in thermal stress indicators during standardized cold-start testing protocols.
What Technical Specifications Make the Affected Air Pump Susceptible?
The problematic Hitachi-made pump (part 06L131003AX) uses brushless DC motors rated for 480W continuous power. Post-recall analysis showed that the original software’s 22-second continuous operation cycle during 0-10°C starts exceeded thermal design limits. The redesigned algorithm implements pulsed operation with 15-second active/5-second rest intervals.
| Parameter | Original Design | Updated Spec |
|---|---|---|
| Max Runtime | 22 seconds | 15 seconds |
| Cooling Interval | None | 5 seconds |
| Power Draw | 420W peak | 380W peak |
Material analysis revealed the pump’s aluminum housing dissipates heat 23% slower than initially projected during rapid cycling. Combined with tight engine compartment packaging, this created localized hot spots reaching 148°C in stress testing. The revised software maintains critical component temperatures below 112°C, within safety margins for adjacent plastic intake components.
Expert Views
“While software recalls are becoming common, Audi’s approach sets a precedent for proactive thermal management in emissions systems,” notes Dr. Hans Weber, automotive electronics specialist. “Their decision to limit duty cycle rather than just monitor failures shows deep system understanding. However, the industry needs better standards for OTA update capabilities in critical components.”
FAQs
- Q: Can I drive my Audi before completing the recall repair?
- A: Audi states vehicles remain operable but recommends avoiding repeated short trips in cold conditions until updated.
- Q: Does the update affect fuel economy or performance?
- A: EPA testing shows negligible impact – 0.1% increase in cold-start emissions with no measurable fuel economy changes.
- Q: Are aftermarket tuning files compatible with the new software?
- A: Most major tuners (APR, Unitronic) released compatible ECU maps within 6 weeks of Audi’s update rollout.