Parts for your 2007 Holden Commodore-Ignition coils

2007 Holden Commodore ignition coils — what they do and when to replace them

Ignition coils are absolutely used on the 2007 Holden Commodore (VE). Technical sources including the Holden VE Commodore Service/Warranty Handbook and workshop manuals for the 3.6‑litre Alloytec V6 (LE0/LY7) and 6.0‑litre L98 V8 specify individual electronic ignition coils controlled by the ECM. GM Powertrain literature for these engines, along with AC Delco and Bosch parts catalogues for VE models, confirm a coil‑on‑plug setup for the V6 and coil‑near‑plug (one coil per cylinder on the rocker covers with short leads) for the V8. There’s no distributor on these engines—each cylinder gets its own coil for precise spark control.

The job of an ignition coil is to step the battery’s 12 volts up to tens of thousands of volts so the spark plug can light the air‑fuel mix. With a coil per cylinder, the Commodore gets cleaner combustion, better cold starts, improved fuel economy and strong performance. The engine computer times and drives each coil, adapting spark energy to load and revs for smooth running across town and on the motorway.

As part of routine servicing, it pays to inspect coils whenever spark plugs are changed (typically 100,000–150,000 km, depending on engine and plug type). Look for cracking, heat discolouration, swollen or oil‑soaked boots, and loose connectors. Use quality replacement coils matched to the engine type, and keep plug gaps to spec—over‑gapped plugs make coils work harder and can shorten their life.

• Common symptoms of a failing coil: rough idle, misfire under load, hard starting, poor economy, check engine light with codes like P0300–P0308 or P0351–P0358.
• Quick tips: keep water and degreaser away from coil tops, replace per‑cylinder boots if brittle, fix any rocker cover gasket leaks that drip oil into plug wells, clear fault codes after repairs and road‑test.

Replacement is straightforward: remove the engine cover, unplug the coil connector, undo the small retaining bolt, and pull the coil straight up from the plug (V8 owners will also remove the short lead from the plug). Check the plug well for oil or moisture, fit the new coil, and torque the fastener snugly. On V8s, route the short leads neatly to avoid arcing. If coils are original and high‑kilometre, consider replacing the most tired units first and re‑evaluate—there’s no rule forcing a full set unless multiple coils test weak. A healthy ignition system keeps the Commodore running crisp and protects the catalytic converters from raw‑fuel misfire damage.

Popular questions

How long do ignition coils last on a 2007 VE Commodore?
With good plugs and no oil ingress, coils often last well past 150,000 km. Heat, worn plugs, or oil in plug tubes can shorten life. If misfires are isolated to one cylinder and move when swapping coils, that coil is due.

Should the coils be replaced individually or all at once?
They can be replaced one at a time when diagnostics point to a single faulty unit. If several coils are original and the vehicle has high kilometres, replacing them in pairs or a full bank can save repeat labour.

Will new coils improve performance or economy?
If existing coils are weak, yes—fresh coils can restore smoothness, throttle response and fuel economy. If the current coils are healthy, there’s no measurable gain from swapping to new ones.