Instrument Panel Cross Member / Cockpit Reinforcement – 4K1857017A

Original cross member under the dashboard (main tubular-profile structural cockpit frame, steering column mount, heater and interior module mount), designed for Audi A7 Sportback, S7 and RS7 (4K / 4K8 generation) and Audi A6 C8 (type 4K2 / 4K5 / 4KA) produced from 2018 to 2026, including versions with 3.0 V6 TFSI (55 TFSI), 2.0 TFSI (40/45 TFSI), TDI diesel engines and S and RS variants, based on the modular longitudinal MLBevo platform.

Original VAG interior structural safety component. Made of high-strength structural steel with precisely selected stiffness zones, coated with factory anti-corrosion paint. Mounted transversely between the body A-pillars. It forms the load-bearing skeleton of the entire cockpit: it ensures the rigid mounting of the steering column, pedal bracket, climate control/heater module (HVAC), upper seatbelt mounts, MMI screens and passenger airbag. A key element stiffening the cabin cage in the bulkhead area during side and frontal collisions.

Technical specifications:

• Catalog part number (OE): 4K1857017A / 4K1 857 017 A (interchangeable with revisions in the 4K1857017, 4K1857017B, 4K1857017C series)

• System / Category: Interior structural components and safety / Cross members, cockpit frames and reinforcements (Cross Member Instrument Panel / Dashboard Carrier Frame Reinforcement)

• Function: Load-bearing cross member / dashboard and steering column frame

• Material / Construction: OEM VAG high-strength alloy steel tube and profiles

• Color / Finish: Black / dark grey anti-corrosion primer

• Mounting location: Vehicle interior – under the dashboard trim (between the left and right A-pillars)

• Dedicated model: Audi A7 Sportback / S7 / RS7 (type 4K8) and Audi A6 / Avant / Allroad (type 4K / C8)

• Steering side: Left (LHD – European version)

• Mounting points: Factory mounting points for the steering column, heater unit, passenger airbag, center console frame and electrical system ground points

• Condition: Original used part (100% straight – checked for geometry, undamaged, no post-collision deformations, all mounting points and threads intact, no corrosion)

• Manufacturer: Audi AG / VAG (Original OEM)

Main application:

• Audi:

  • A7 Sportback (type 4K8) – model years 2018 to 2026 (all engine and equipment versions)

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

  • RS7 Sportback (type 4K8) – model years 2019 to 2026

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

  • S6 / RS6 Avant (type 4K - C8) – model years 2019 to 2026

Fitment guarantee and VIN verification

Each cross member undergoes a rigorous axial geometry check and mounting thread condition inspection before being prepared for shipping.

Fitment / installation note: The initial 4K1 designation (instrument panel group 857) clearly specifies the design for left-hand drive (LHD – European version) vehicles. The cross member is a critical component in professional vehicle restoration after airbag deployment or collision – even a minimal frame misalignment prevents the even fitting of dashboard gaps, MMI screens and air vent grilles. Using an original OEM cross member guarantees factory stiffness and trouble-free mounting of all interior modules. Before purchase, we recommend comparing the OE number on the cross member sticker or verifying fitment using the vehicle VIN.