PRC1716 - Ballast Resistor – Heater & Glow Plug

- €19,50

€19,50

€19,50 - €19,50

€19,50

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

Heater (Glow) Plug Ballast Resistor for the diesel pre-heat circuit. Wired in series with the heater plugs, the resistor drops the battery supply to the voltage the plugs require during cold starting, protecting them from over-voltage.

For the 2.25L diesel engine. Supplied as the resistor coil on its mounting bracket.

Vehicle Model Land Rover Defender up to 2016
Land Rover Series 2 and 3

Fitment Notes SERIES II/III — 12V diesel
DEFENDER — early diesel models

Alternative Codes

PRC1716545030548296BR 1556

In stock 9 units

8 · Gouda 1 · 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 0 job kit(s) below. Pick the kit that matches your vehicle and job, then add what you need.

Frequently asked questions

What does the heater plug ballast resistor do?

The heater plug ballast resistor sits in series with the glow plugs on the diesel pre-heat circuit. It drops the battery supply to the lower voltage the heater plugs need during cold starting, protecting them from over-voltage. It's supplied as the resistor coil on its mounting bracket for the 2.25L diesel.

Where does this ballast resistor fit?

The ballast resistor fits into the glow plug supply circuit, typically mounted near the heater plugs on the engine or bulkhead. It's wired in series, so current to the plugs passes through it. On Series and early Defender diesels it pairs with the original heater plugs that run on a reduced voltage.

Do all diesel glow plug systems need this resistor?

No. This ballast resistor is only used where the heater plugs are designed to run on a reduced voltage, as on the early 2.25L Series and Defender diesels. Later systems with self-regulating 12V glow plugs don't use a series resistor. Check your pre-heat circuit type before fitting.

Which Land Rovers does this ballast resistor fit?

This ballast resistor fits Land Rover Series 2 and 3 12V diesel models and early Defender diesel models with the original heater plug pre-heat system. Fitment depends on the glow plug type fitted rather than model year alone, so confirm your pre-heat circuit matches.