Control Lambda Sensor (Pre-Catalyst) – 06M906265

Original wideband lambda sensor (exhaust gas oxygen sensor / control sensor mounted before the catalyst), designed for Audi A7 Sportback (4K / 4K8 generation) and Audi A6 C8 (4K2 / 4K5 / 4KA type) with turbocharged petrol engines 3.0 V6 TFSI (55 TFSI designation / EA839 family / DLZA, DKMB and related fault codes), as well as related models based on the modular MLBevo platform.

Original VAG exhaust system and emissions control component. Equipped with a ceramic measuring element integrated with an efficient electric heater, a stainless steel body with precision-machined threads, a flexible cable in a reinforced thermal sleeve, and a sealed signal connector. Responsible for continuously measuring the oxygen content in the exhaust gases leaving the cylinder bank ("hot-V") and transmitting data in real time to the engine control unit (ECU). Ensures optimal air-fuel mixture selection (lambda ratio), minimum fuel consumption, instant throttle response, and proper catalyst protection.

Technical specifications:

• Catalog part number (OE): 06M906265 / 06M 906 265 (also available with letter suffixes in the 06M906265A, 06M906265B, 06M906265C, related to the numbering 8W0906265K)

• System / Category: Exhaust System / Engine Management (Exhaust System / Oxygen Lambda Sensor)

• Function: Pre-catalyst control sensor (Pre-Catalyst / Upstream Oxygen Sensor)

• Sensor type: Wideband with electric heater (Broadband Lambda Sensor)

• Dedicated engine: 3.0 V6 TFSI (55 TFSI / EA839 family) and related 2.9 V6 TFSI units (S6 / S7 / RS4 / RS5)

• Construction: Stainless steel body, factory thermal insulation braid protecting the wiring harness from exhaust temperatures, sealed VAG connector

• Installation side: Exhaust system – directly behind the turbocharger / before the main catalyst

• Steering side: Left (LHD – European version) and Right (RHD) – universal component

• Condition: Original part, used (100% functional, electrically tested – heater functional with correct resistance, no oxygen signal reading errors, thread intact and clean, thermal shield undamaged, connector intact)

• Manufacturer: Audi AG / VAG / Bosch (Original OEM)

Main application:

• Audi:

  • A7 Sportback (4K8 type) – model years 2018 to 2026 (3.0 TFSI / 55 TFSI engines)

  • S7 Sportback (4K8 type) – model years 2019 to 2026 (2.9 TFSI engines)

  • A6 / A6 Avant / Allroad (4K2 / 4K5 / 4KA - C8 type) – model years 2018 to 2026 (3.0 TFSI / 55 TFSI engines)

  • S6 Avant / Saloon (4K - C8 type) – model years 2019 to 2026 (2.9 TFSI engines)

  • A4 / S4 / A5 / S5 (8W / F5 - B9 type) – 3.0 TFSI engines (CWGD code)

  • Q7 / Q8 (4M / 4MN type) – versions with 3.0 TFSI unit

  • Volkswagen: Touareg III (CR7 type) – 3.0 TFSI V6 engines

  • Porsche: Cayenne / Panamera (9YA / 971 type) – 3.0 V6 Turbo engines (EA839)

Fitment guarantee and VIN verification

Each sensor undergoes heater circuit verification with an ohmmeter and mechanical thread condition inspection before shipping.

Fitment / installation tip: The initial 06M designation assigns the sensor directly to VAG V6 engine accessories (EA839). Pre-catalyst sensor failure is indicated by increased fuel consumption, jerking during acceleration, Check Engine light, and mixture fault codes (too rich / too lean). Using an original OEM sensor eliminates slow signal response issues often found with universal replacements. Before screwing in, it is recommended to apply high-temperature grease to the thread (avoiding the measuring tip). Before purchase, we recommend comparing the OE number on the body or verifying fitment using the vehicle's VIN.