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 6 units

4 · Gouda 2 · Drachten

Express delivery available

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.

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.