ERR6658 - Ancillary Drive Idler Pulley

- €56,00

€56,00

€56,00 - €56,00

€56,00

Aftermarket: Quality alternative. This is a quality alternative, designed to fit and function like the original part, often at a more competitive price.

Ancillary Drive Idler Pulley for the Td5 2.5L 5-Cylinder diesel engine.

Located within the front-of-engine ancillary drive system, this pulley provides a fixed routing point for the auxiliary drive belt, maintaining correct belt alignment and tension for reliable operation of belt-driven accessories.

Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 2 1998-2004 (L318)

Fitment Notes DEFENDER 1987-2006 — 2.5L Td5 5-Cyl Diesel (with and without AC)
DISCOVERY 2 1998-2004 — 2.5L Td5 5-Cyl Diesel, without ACE (with and without AC)

Alternative Codes

ERR6658ERR6658R

In stock 4 units

3 · Gouda 1 · Drachten

Express delivery available

4 more on the way · ETA 12-09-2026

When will my order arrive?

Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
Netherlands / Belgium / Germany: 2–4 working days.
Other EU countries + UK: 4–8 working days.
Outside EU/UK: delivery times vary — contact us for an estimate.

4 more units on the way — expected 12-09-2026. Orders beyond current stock are reserved from incoming stock and shipped as soon as they arrive.

Items may ship from multiple warehouses at no extra cost.

Job kits containing this part

This part is included in 1 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the ERR6658 ancillary drive idler pulley do on a Td5?

The ERR6658 is the idler pulley for the ancillary drive belt on the 2.5L Td5 five-cylinder diesel. It maintains belt tension and alignment on the serpentine system driving the alternator and ancillaries. It fits the Defender (up to 2006) and Discovery 2 (1998-2004) Td5.

What are the signs the idler pulley is failing on a Td5?

A worn idler pulley typically produces a squealing or rumbling noise from the front of the engine, varying with engine speed. On the Td5, a seized or wobbling pulley can cause rapid belt wear or belt failure, leaving the alternator and ancillaries without drive.

Does this fit Discovery 2 Td5 models with ACE?

No. ERR6658 fits Discovery 2 Td5 models without ACE (Active Cornering Enhancement). The ACE system uses an additional hydraulic pump driven by the ancillary belt, which requires a different pulley configuration. Check your vehicle specification before ordering.