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Function: Precisely controls the amount of air entering the engine for smooth idle and acceleration
designed for VW models equipped with the 01M automatic transmission
effectively preventing oil leaks and extending transmission life
supplying original equipment coils to major automakers
Behr Engine Coolant Reservoir for Audi Q5/S5/S4 (8K0121405N) 310mm Function: Precisely controls the amountThe Behr Engine Coolant Reservoir (part number 8K0121405N) is a premium replacement part designed for Audi Q5, S5, S4, and A4 models. It stores coolant and maintains system pressure, ensuring optimal engine temperature. Manufactured by MAHLE Behr, this reservoir meets or exceeds OE specifications for reliable performance. Key Features & Benefits OE quality: Manufactured by Behr, a top OEM supplier of cooling systems. Direct fit: Precision engineered