{"product_id":"csf-3688-drive-motor-inverter-cooler","title":"CSF 3688 Drive Motor Inverter Cooler","description":"\u003ch2\u003eDrive Motor Inverter Cooler for Lexus RX450h\u003c\/h2\u003e\u003cp\u003eCSF 3688 is a direct-fit drive motor inverter cooler built for 2010-2015 Lexus RX450h applications. It uses an OE-style plastic tank and aluminum core layout, with an upgraded B-tube design for improved cooling efficiency and durability.\u003c\/p\u003e\u003cp\u003eFor Lexus RX450h owners searching for a replacement inverter cooler, CSF 3688 provides the correct cross-flow configuration and factory-style dimensions for a clean fit. The part number 3688 is also referenced in OE-style cooling replacement searches for this vehicle platform.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOE-style plastic tank and aluminum core construction\u003c\/li\u003e\n\u003cli\u003e1-row, cross-flow design\u003c\/li\u003e\n\u003cli\u003eUpgraded higher-performance B-tube core design\u003c\/li\u003e\n\u003cli\u003eTop hose fitting: 11\/16 right\u003c\/li\u003e\n\u003cli\u003eBottom hose fitting: 11\/16 left\u003c\/li\u003e\n\u003cli\u003eCore size: 26 5\/16 in. length x 3 1\/4 in. width x 7\/8 in. thickness\u003c\/li\u003e\n\u003cli\u003eBuilt for 2010-2015 Lexus RX450h fitment\u003c\/li\u003e\n\u003cli\u003eCSF part number 3688\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eCSF 3688 is engineered as a replacement drive motor inverter cooler for the 2010-2015 Lexus RX450h. The unit combines a plastic tank design with an aluminum core to match OE-style packaging while using a stronger B-tube core structure for improved heat transfer performance. CSF manufactures a wide range of cooling components and validates designs through laboratory wind-tunnel testing to confirm cooling performance.\u003c\/p\u003e\u003cp\u003eThis cooler is a practical choice for Lexus RX450h cooling system service when the original inverter cooler is leaking, restricted, or no longer maintaining proper thermal control. The cross-flow layout, inlet and outlet sizing, and overall core dimensions are specified to support accurate replacement selection. Part number 3688 is also commonly searched alongside Lexus RX450h inverter cooler replacement needs.\u003c\/p\u003e\u003cp\u003eThis part cross-references Bosch 13355 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eInverter cooling loss from a leaking or damaged cooler\u003c\/li\u003e\n\u003cli\u003eRestricted coolant flow through a clogged core\u003c\/li\u003e\n\u003cli\u003eOverheating concerns in hybrid drive motor inverter systems\u003c\/li\u003e\n\u003cli\u003eFitment issues caused by using the wrong core style or hose orientation\u003c\/li\u003e\n\u003cli\u003eReplacement needs for aging OE-style plastic tank coolers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify hose orientation, inlet and outlet dimensions, and mounting layout before installation. This cooler is a cross-flow design with 11\/16 in. right top hose fitting and 11\/16 in. left bottom hose fitting, so matching the original configuration is important for proper routing. Radiator cap is not supplied.\u003c\/p\u003e\u003cp\u003eFor best results, inspect related coolant hoses and connections during replacement and confirm the vehicle is a 2010-2015 Lexus RX450h. Use the listed core dimensions and OE-style tank construction to compare against the removed unit before installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eCSF builds cooling products to high-performance standards and manufactures a broad catalog of radiator and cooler applications for leading vehicle brands. The company states its factories are ISO\/TSO certified and its designs are validated through laboratory testing for cooling performance.\u003c\/p\u003e","brand":"CSF","offers":[{"title":"Default Title","offer_id":52431272149173,"sku":"BBMD-3688","price":96.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/C3_3688_Fro.jpg?v=1777849697","url":"https:\/\/www.partcatalog.com\/products\/csf-3688-drive-motor-inverter-cooler","provider":"PartCatalog","version":"1.0","type":"link"}