Parts for your 2016 Ford Ranger-Spark plugs

2016 Ford Ranger spark plugs: what’s actually fitted

Short answer: for the 2016 Ford Ranger sold across Australia and New Zealand, spark plugs aren’t used. The 2016 PX MkII Ranger lineup here runs diesel Duratorq TDCi engines (2.2‑litre I4 and 3.2‑litre I5), which use compression ignition and glow plugs rather than spark plugs. This is confirmed by Ford’s PX MkII Owner’s Manual (2016), the Ford Workshop Manual sections for the 2.2L/3.2L Duratorq diesel (which cover glow plug control and testing, not spark plugs), and Ford Australia’s 2016 specification/brochure materials listing diesel-only powertrains.

Why no spark plugs? Diesel engines ignite fuel by squeezing air to very high pressures and temperatures. There’s no spark event, instead, a set of glow plugs helps with cold starts by pre-heating the combustion chamber. Once running, combustion is maintained by heat and compression, so spark plugs aren’t part of the system — and won’t appear on any genuine service schedule for these engines.

There is one caveat. In some overseas markets a 2.5‑litre petrol Ranger existed around this era, and that engine does use spark plugs. However, that petrol option wasn’t a mainstream offering in AU/NZ for 2016. If a 2016 Ranger here has been privately imported or converted, check the engine code and service book to confirm whether it’s diesel (glow plugs) or petrol (spark plugs).

For owners searching “2016 Ford Ranger spark plugs”, chances are they’re really chasing info about glow plugs. While glow plugs often last well past 100,000 km, they’re not strictly a scheduled replacement item — they’re tested and replaced when symptoms show up.

• Common signs of tired glow plugs on a 2.2L/3.2L Ranger: hard starting when cold, extended cranking, rough idle on first start, white/grey smoke, and a glow plug/engine warning lamp.
• Good practice at service time: verify the glow plug system with a scan tool, battery and charging health check, and resistance tests on the plugs if starting issues are reported.
• If replacement is needed: use the correct spec (Motorcraft or equivalent), follow the workshop manual procedure and torque values, and only remove plugs from a warm engine to reduce the risk of thread damage.

Technical sources referenced: Ford PX MkII Ranger Owner’s Manual (2016, AU/NZ), Ford Ranger PX MkII Workshop Manual (Duratorq TDCi 2.2L/3.2L engine sections and glow plug control), and Ford Australia 2016 PX MkII range specifications.

Does a 2016 Ford Ranger have spark plugs?

Not on Australian and New Zealand models with the 2.2L or 3.2L Duratorq TDCi diesels — they use glow plugs. Only certain overseas petrol variants from that period used spark plugs.

How often should glow plugs be replaced on a 2016 Ranger?

There’s no fixed kilometre interval in the Ford schedule. Many last 150,000 km or more. Replace when testing or symptoms point to a fault (hard cold starts, smoke, warning light). Always confirm with diagnostic checks before swapping parts.

How can someone tell if their 2016 Ranger is petrol or diesel?

Check the fuel cap label, the service book, or the engine code on the compliance/vehicle label (common diesel codes include P5AT for 3.2L and ZSD‑422 for 2.2L). A diesel will also show a glow plug indicator on the dash at start-up.