Western Star

The Active Radiator WES18203NV is a heavy-duty, OE-style radiator engineered specifically for Western Star trucks. Built with a durable aluminum core and reinforced plastic tanks, it provides strong cooling performance under demanding conditions. The right-side 2.5" inlet and outlet ensure proper flow, while the integrated oil cooler adds efficient thermal control for engines that work hard. Designed to meet OEM fit and function, this radiator installs easily as a direct bolt-in replacement. Reliable, long-lasting, and built for tough routes, it keeps your Western Star running cool and protected.

Active Radiator Part No: WES18203NV

$1,050.77

Specifications

Enhance your Western Star truck with the Active Radiator WES18203NV, a reliable OEM-style radiator built for heavy-duty use. It features a robust aluminum core and plastic tanks, with right-side 2.5″ inlet and outlet, and a built-in oil cooler for optimal thermal management. Engineered to OEM specifications and precision-fit for direct bolt-in replacement, this radiator reduces downtime and enhances durability. Always in stock and ready to ship from Wofford Truck Parts.

Weight

Compatibility

Western Star 3800 (1990–1999)

Western Star 4800 (1990–1999)

Western Star 4900 (1984–2007)

Western Star 4900E (1997–2002)

Western Star 4900EX (2003–2007)

Western Star 4900FA (2002–2006)

Western Star 4900SA (2002–2007)

Western Star 5800 (1999–2002)

Western Star 5900 (1993–2001)

Alternative Part Numbers

17V9785
1E3903
1E3903D
1E3914
1S3903
222273409
22227‑3409
22227‑3411
222273411
22243409
22273409
22273411
374135C
44014701
441199
44WS35C
ABPN09BH35C
BT1142
BTC1142
CA2122
CAC142
CBWS35C
CWS35C
DHT35C
DHTWS35C
DURWSDAC35C
FLX011502
HDH010231
IE3903
IE3903D
IE3914
IS3903
MOD1E3523
MOD1E3903D
MOD1S3903
REA611031
RHT041
SPI44014701
WES18203
WES18203N
WES18203R
WSR1142
WSCA035C0TF
WSDAC35C
WSDAC‑35C
ZGGD‑004