Parts for your 2008 Volvo Xc60-Ignition coils

2008 Volvo XC60 ignition coils — what they do and when to replace them

Based on Volvo technical sources such as VIDA service information and the official Volvo parts catalogue for the 2008 launch-year XC60, ignition coils are fitted to the petrol models (e.g., the 3.0 T6 B6304T-series) as coil-on-plug units, one per cylinder. Diesel variants (e.g., D5 D5244T-series) use compression ignition and do not use ignition coils at all. So, for petrol XC60s, ignition coils are directly relevant, for diesels, they’re not part of the engine at all.

On the 2008 Volvo XC60 petrol engine, the ignition coils sit right on top of each spark plug. Their job is to take the 12-volt supply and step it up to the thousands of volts needed to jump the gap at the plug and light the air–fuel mix. When they’re healthy, starts are crisp, idle is smooth, fuel economy stays on track and the catalytic converter is kept happy.

Coils don’t have a strict replacement interval in Volvo’s servicing schedule, they’re replaced on condition. Typical signs it’s time include a rough idle, stumble under load, poor fuel economy, a flashing check-engine light, and misfire codes (P0300–P0306). If one has failed at higher kilometres, it’s common to replace the affected coil along with the spark plug, and consider doing the remaining coils if they’re the same age and the vehicle has racked up a lot of kays.

Good workshop practice on the XC60 petrol includes:

• Replace spark plugs at the recommended interval and use the correct spec, fresh plugs reduce coil stress.
• Inspect coil boots for tracking, oil intrusion and hardening, replace any dodgy boots and fit dielectric grease on reassembly.
• Avoid blasting water under the bonnet, moisture in the plug wells can trigger misfires.
• Scan for codes after any misfire event and address promptly to protect the catalytic converter.
• Use quality OEM-equivalent coils, cheap units can introduce intermittent faults that are hard to chase.

There’s no harm carrying a spare coil in the boot on long trips if the vehicle is older—swapping a suspect unit coil-for-coil can be a handy roadside diagnostic. For diesel XC60 owners, there’s nothing to service here—no spark plugs or coils—so any rough running needs a different work-up (fuel system, air leaks, EGR/DPF).

Popular questions

How many ignition coils does a 2008 Volvo XC60 have?
The petrol XC60 has six coil-on-plug ignition coils, one per cylinder. The diesel D5 models don’t use ignition coils at all because they ignite fuel by compression rather than a spark.

When should the ignition coils be replaced?
There’s no fixed interval. Replace coils when misfires occur, especially with matching fault codes, rough idle, or poor performance. It’s smart to pair coil replacement with new spark plugs and to inspect the boots and plug wells at the same time.

Is it safe to drive with a failing ignition coil?
Only briefly if absolutely necessary. Driving with a misfire can overheat and damage the catalytic converter and may foul the plug. Minimise load, and get the coil and plug sorted as soon as possible.