Mercedes Sprinter A/C Drive Belt Idler Pulley Bracket – OEM | OM642 3.0L V6 | #6422300642

DESCRIPTION:

The A/C drive belt idler pulley bracket is a small but load-bearing component in your Sprinter's serpentine belt system. It mounts between the engine and alternator and provides the mounting point for the idler pulley that keeps the A/C compressor drive belt on track. When the bracket cracks, strips, or the pulley bearing wears, belt alignment is lost — leading to noise, vibration, premature belt wear, and eventually A/C failure. This OEM replacement restores proper pulley positioning and belt alignment without modification.

What This Part Does

This bracket positions and supports the idler pulley in the A/C drive belt circuit. The idler pulley it carries maintains proper belt wrap angle and tension around the A/C compressor — critical for smooth, efficient compressor operation. Unlike the main belt tensioner, this bracket is a fixed mount, which means physical damage or bearing failure requires full bracket replacement.

When to Replace It

Replace this bracket if you notice A/C belt slipping, squealing, or misalignment, if the idler pulley has excessive play or rough bearing feel, if the bracket is visibly cracked or damaged, or during any A/C compressor replacement when the belt drive system is already disassembled. It's a smart preventive add-on any time the A/C belt or compressor is being serviced.

Fitment

• 2007–2009 Dodge Sprinter 2500/3500 – 3.0L V6 Diesel (OM642)
• 2007–2017 Freightliner Sprinter 2500/3500 – 3.0L V6 Diesel (OM642)
• 2010–2022 Mercedes-Benz Sprinter 2500 – 3.0L V6 Diesel (OM642)
• 2010–2022 Mercedes-Benz Sprinter 3500 – 3.0L V6 Diesel (OM642)

Always verify your VIN before ordering. Contact us and we'll confirm fitment before you buy.

Part Numbers

• Mercedes OEM: 6422300642 / A6422300642 / 642-230-06-42
• SKU: 6422300642OE