Original Rear Floor / Exhaust System Heat Shield – Audi A7 Sportback 3.0 TFSI (Type 4K8) – 4K0804172D

Original factory underbody heat shield mounted in the rear floor section above the exhaust system / mufflers (rear exhaust heat shield / trunk floor heat shield – Wärmeschutzblech Abgasanlage Hinten / Rear Exhaust Heat Shield Underbody), designed for Audi A7 Sportback 55 TFSI and S7 (4K8 / C8 generation) manufactured from model years 2018 to 2026+, with particular consideration for versions with the turbocharged gasoline engine 3.0 TFSI V6 (EA839 / DLZA engine with 340 hp) equipped with mild hybrid technology (MHEV 48V) and quattro all-wheel drive, based on the modular MLB Evo platform.

Original Audi OE group component made of multi-layer, profiled aluminum alloy with a characteristic stamped scale-like structure. It features excellent thermal insulation, effectively reflecting infrared radiation generated by the heated exhaust system and mufflers. The shield protects the spare wheel well / trunk floor trim from overheating, where the battery system and electrical modules are located in A7 4K8 models. The design with stamped reinforcing ribs provides resistance to vibrations, acoustic resonances, and the effects of road salt and moisture.

Technical specifications:

• Catalog part number (OE): 4K0804172D / 4K0 804 172 D (and related engineering revisions from the 4K0804172 series, 4K0804172A, 4K0804172B, 4K0804172C)

• System / Category: Exhaust system and underbody / Underbody heat shields, rear exhaust section insulation shields (Rear Heat Shield / Wärmeschutzblech Hinten)

• Mounting location: Rear underbody – floor above the rear exhaust section / trunk well

• Material: Multi-layer stamped technical aluminum with enhanced resistance to corrosion and thermal fatigue

• Dedicated engine: 3.0 TFSI V6 (55 TFSI / 340 hp, DLZA code) and related V6 gasoline variants

• Dedicated model: Audi A7 Sportback (Type 4K8) and related MLB Evo platform models (Audi A6 C8 Type 4K)

• Production years: from 2018 to 2026+

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

• Condition: Original part, used (very good condition – healthy, straight structure, mounting hole flanges intact and not bent, no fatigue cracks, no deep abrasions, geometry fully preserved)

• Manufacturer: Audi AG (Original OEM)

Main application:

• Audi:

  • A7 Sportback 55 TFSI quattro (Type 4K8) – model years 2018 to 2026+ (3.0 TFSI 340 hp engine)

  • A6 Sedan / Avant 55 TFSI quattro (Type 4K2 / 4K5 / C8) – model years 2018 to 2026+ (3.0 TFSI engine)

  • S7 Sportback TFSI (Type 4K8 – US/non-European market versions) – model years 2019 to 2026+ (2.9 TFSI V6 engine)

(Note: The stamped profile is designed for the rear floor layout and exhaust manifold of V6 gasoline engines on the MLB Evo platform. Before installation in 2.0 TFSI / TDI 4-cylinder variants, it is recommended to verify the shape and OE number according to the parts catalog).

Installation and operating instructions

Each heat shield undergoes a check of the mounting hole rigidity and a surface flatness inspection for dents before storage.

Fitment / installation note: Number 4K0804172D specifies the rear section of the floor heat shield. In used aluminum shields, the mounting holes are a key element – due to galvanic corrosion with steel body bolts, the thin sheet metal often oxidizes and falls out of the screws. The offered item has rigid, unbent mounting points. Installation is carried out directly on the welded underbody bolts using factory nuts/clamping washers. The use of the original OEM shield guarantees an effective thermal barrier for the trunk floor and prevents rattling and resonances under engine load. Before purchase, we recommend comparing the OE number stamped on the component or verifying it using the vehicle's VIN.