Parts for your 2018 Ford Ranger-Ignition coils

2018 Ford Ranger ignition coils — are they used on this model?

For Australian and New Zealand 2018 Ford Ranger models, ignition coils generally aren’t relevant. The common engines for that year — the 2.2‑litre and 3.2‑litre Duratorq TDCi diesels — do not use ignition coils because they don’t use spark plugs. As outlined in Ford’s Ranger PX II/PX III Workshop Manual (engine section 303-04), and reflected in the 2018 Owner’s Manual for local models, these diesels run compression ignition and are equipped with glow plugs and a glow plug control module instead. This aligns with standard diesel design described in technical references like the Bosch Automotive Handbook: diesels ignite fuel from heat generated by compression, not an electrical spark.

That’s why an ignition-coils part isn’t fitted or serviced on most 2018 Rangers here. During regular servicing, technicians will instead check items like the glow plugs, glow plug wiring, fuel system, and injectors. If a 2018 Ranger is misfiring or stumbling, diagnosis on a diesel will focus on fuel delivery, air leaks, EGR function, boost system integrity, or injector performance — not coils or spark plugs.

There is one exception owners should keep in mind. A small number of 2018 Rangers in other markets were fitted with a 2.5‑litre petrol engine, which uses coil‑on‑plug ignition coils. If a petrol variant has found its way into Australia or New Zealand (parallel import or fleet special), it will have ignition coils that sit directly on each spark plug.

• How to tell what you’ve got: a diesel has no spark plug leads or coil packs and will show a glow plug indicator on the dash at cold start, a petrol will have spark plugs and a typical coil‑on‑plug setup on top of the rocker cover.
• If petrol: coils aren’t a scheduled replacement item. Replace only when faulty (hard start, misfire under load, rough idle, logged misfire codes). Always pair coil checks with fresh, correct‑spec spark plugs at the recommended interval and keep moisture/oil out of the plug wells.

Technical sources referenced: Ford Ranger PX II/PX III Workshop Manual (Engine — 2.2L/3.2L Duratorq TDCi, Section 303‑04), Ford 2018 Ranger Owner’s Manual (AU/NZ market), and Bosch Automotive Handbook guidance on diesel compression ignition versus spark‑ignition systems.

Popular questions about 2018 Ford Ranger ignition coils

Do 2018 Ford Ranger diesels have ignition coils?
No. The 2.2L and 3.2L TDCi diesels don’t use spark plugs, so there are no ignition coils. They rely on compression ignition and use glow plugs to aid cold starts.

What replaces ignition coils on a diesel Ranger?
Diesel models use glow plugs and a glow plug control module. During servicing, technicians check glow plug operation, fuel system condition, and air/boost systems rather than an ignition system.

What if my 2018 Ranger is petrol — do I need to service the coils?
If it’s a 2.5L petrol variant, it has coil‑on‑plug units. Coils are usually replaced only when faulty. Keep up with correct spark plug changes and inspect the coil boots for cracking or oil contamination to avoid misfires.