Parts for your 2014 Toyota Land cruiser-Ignition coils

2014 Toyota Land Cruiser ignition coils — what they are, and whether your Cruiser has them

Ignition coils are fitted to 2014 Toyota Land Cruiser models with petrol engines, but they’re not used on diesel variants. Technical references back this up: the Toyota Repair Manual for 2014 Land Cruiser petrol models (3UR‑FE V8) lists eight coil‑on‑plug ignition coils in the Ignition System section, one per cylinder. By contrast, the Toyota New Car Features manual for the 200 Series 1VD‑FTV V8 diesel explains it’s a compression‑ignition engine that uses high‑pressure common‑rail injection and glow plugs for cold starts, with no spark plugs or ignition coils. Owners’ maintenance schedules reflect this too: petrol models include spark plug service intervals, while diesel schedules do not list plugs or coils.

For petrol‑powered 2014 Land Cruisers, the ignition coils are the unsung heroes that turn the battery’s 12 volts into the tens of thousands of volts needed to fire the iridium spark plugs. Each cylinder gets its own coil mounted directly on top of the plug (coil‑on‑plug), which improves spark accuracy, reduces energy loss, and helps with smoother running and better fuel economy.

How do they go wrong? Age, heat, oil contamination in the plug tubes, or moisture under the bonnet can break down the coil insulation. Telltale signs include a rough idle, hesitation on take‑off, a noticeable drop in power on hills, higher fuel use, and a check engine light. Common scan tool codes are P0300–P0308 (misfires) and P0351–P0358 (coil circuit faults).

There’s no strict replacement interval for coils, but many last well past 150,000–250,000 km. They’re generally replaced as needed. When servicing, it’s smart to:

• Inspect coil boots for cracking or carbon tracking when you’re changing spark plugs (typically around 120,000 km for iridium on petrol models, follow the service manual).
• Keep water and degreaser away from the coil tops and connectors when cleaning the engine bay.
• Fix any rocker cover gasket leaks that can let oil foul the plug tubes and damage coils.
• Use quality coils matched to the engine (3UR‑FE petrol V8 uses eight coils), and ensure connectors click home firmly.

If one coil fails, replacing just the culprit is fine, however, on high‑kilometre engines or if multiple cylinders are misfiring, replacing coils in pairs or as a complete set can save repeat labour. Always pair new coils with the correct spec iridium plugs and check for any underlying causes like vacuum leaks or injector issues.

If your 2014 Land Cruiser is the 1VD‑FTV diesel (very common in Australia and New Zealand), it won’t have ignition coils at all. That engine relies on diesel’s compression‑ignition, so there are no spark plugs, instead, it uses glow plugs for cold starting. Any misfire‑like symptoms on the diesel should be diagnosed via the fuel system, air intake, EGR, or turbocharging rather than an ignition system that isn’t there.

Does my 2014 Land Cruiser have ignition coils?

Petrol models do — they use eight coil‑on‑plug units, one per cylinder. Diesel 1VD‑FTV models don’t have ignition coils because they’re compression‑ignition engines and don’t use spark plugs.

How often should ignition coils be replaced on a 2014 Land Cruiser?

There’s no fixed interval. Coils are replaced when they fail or show symptoms like misfires and rough running. Stick to the spark plug interval (around 120,000 km for iridium on petrol models) and inspect coil boots at the same time to prevent issues.

Is it safe to keep driving with a bad ignition coil?

Not recommended on petrol models. A persistent misfire can overheat and damage the catalytic converters and may lead to poor fuel economy and drivability issues. It’s best to diagnose and fix the fault promptly. Diesel models aren’t affected because they don’t use ignition coils.