BMW 850i Spark Plug Replacement Cost.

The average cost for a Spark Plug Replacement is between $337 and $461. Labor costs are estimated between $193 and $245 while parts are priced between $144 and $216. Estimate does not include taxes and fees.
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Best Practices

To prevent ignition misfires and Check Engine Light problems, we recommend using only high-quality spark plugs, and preferably spark plugs from BMW.

Spark plugs have different ratings and it's important that the correct type are used.

Spark plug terminals wear down over time and can lead to engine misfires. At minimum, they need to be replaced at the mileage specified by BMW.

Common Symptoms

Failing spark plugs can cause the BMW 850i's engine to run rough and misfire, which can trigger the Check Engine Light. Continuing to drive under these conditions can damage the catalytic converter.

Most Common BMW 850i Repairs

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