ERR4708 Auxiliary Drive Belt Tensioner – Defender 300Tdi

Keep your Defender 300Tdi running smoothly with this Brand New Auxiliary Drive Belt Tensioner (Part No. ERR4708). This tensioner maintains proper belt tension on the alternator, power steering, and other engine-driven accessories—preventing belt slip, squealing, charging issues, and overheating caused by insufficient drive.

Built to OEM specifications, the unit features a durable spring-loaded mechanism and high-quality pulley bearing for long service life. It’s an essential replacement for high-mileage or noisy tensioners and an ideal upgrade during routine front-end engine maintenance.

Fits:

• Defender 300Tdi (1994–1998 & ROW models through 2006)

Install tip: Always inspect the auxiliary belt and idler pulley during tensioner replacement. Replace if cracked or glazed.*

Supersession Part Numbers

No supersessions found.

FAQ

Is this a direct bolt-on replacement?
Yes — it installs using factory mounting points on all 300Tdi engines.

Should I replace the belt at the same time?
Yes — it’s best practice to replace the auxiliary belt along with the tensioner.

What are signs of a failing tensioner?
Squealing belt, poor charging, vibration, belt wandering, or visible pulley wobble.

Part Number: ERR4708

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