CSF 7046 2-Row B-Tube Radiator w/AT Cooler for 2006-2016 BMW 135i/335i X1/Z4 AWD

Vehicle Fitment

• 2006-2013 BMW 135i Coupe/Convertible (E82/E88, N54/N55, RWD)
• 2006-2011 BMW 335i/335xi Sedan/Touring (E90/E91, N54/N55, RWD & AWD)
• 2005-2010 BMW 335i/335xi Coupe/Convertible (E92/E93, N54/N55, RWD & AWD)
• 2008-2016 BMW X1 sDrive/xDrive 28i & sDrive35i (E84, N20/N55, RWD & AWD)
• 2008-2016 BMW Z4 sDrive28i, sDrive35i, sDrive35is (E89, N20/N54/N55, RWD)
• 2011 BMW 1 Series M Coupe (E82, N54, RWD)

Features

• 2-row, 42 mm thick B-Tube core for increased surface area & cooling
• 6.5 mm multi-louvered fin design for max airflow & heat rejection :contentReference[oaicite:6]{index=6}
• All-aluminum tanks & core with CNC-machined fittings & brackets
• OEM-style quick connect inlet/outlet - no modifications required :contentReference[oaicite:7]{index=7}
• Includes integrated ATF cooler for automatic transmission models :contentReference[oaicite:8]{index=8}
• Race-style aluminum drain plug & mirror-satin finish
• Individually pressure & leak tested; designed for high-boost applications :contentReference[oaicite:9]{index=9}
• ISO-certified manufacturing & drop-in installation across listed models

Specifications

• Core dimensions: approx. 23.63" x 13.63" x 1.63" :contentReference[oaicite:10]{index=10}
• Inlet/outlet: 1.50" diameter quick-connect :contentReference[oaicite:11]{index=11}
• Material: 100 % TIG-brazed aluminum (tanks & core)
• Includes ATF cooler for automatic transmission variants
• Drivetrain: RWD & AWD supported
• Engine compatibility: N54, N55, N20 & related auto transmissions
• Fitment confirmed 2006-2016; later model support unconfirmed

Included Components

• 1x CSF 7046 radiator with integrated ATF cooler
• 1x Race-style aluminum drain plug
• OEM-fit mounting brackets & hardware

Product Description

The CSF 7046 high-performance aluminum radiator with integrated automatic transmission cooler is engineered for BMW 135i, 335i, X1, Z4, and 1 Series M models produced from 2006-2016. Featuring a robust 2-row, 42 mm B-Tube core with multi-louvered fins, it delivers superior airflow and heat rejection, ideal for N54/N55 turbocharged engines and spirited driving :contentReference[oaicite:12]{index=12}.

CNC-machined quick-connect fittings and OEM-compatible brackets allow this radiator to install as a true drop-in upgrade - no modifications needed. Each unit is individually pressure and leak tested, constructed from TIG-brazed aluminum, and includes a race-style drain plug and mirror-satin finish.

Designed to handle factory to track-level cooling demands, the CSF 7046 supports both RWD and AWD configurations and is ideal for owners seeking reliability and performance under aggressive use. Fitment confirmed through 2016; compatibility with newer models is unconfirmed at the time of listing.