Will it hurt my BMW 840i xDrive to drive with old spark plugs?

Replace spark plugs on time or about every 30,000 miles or so. Without the spark of electricity created by spark plugs, your engine doesn’t have the combustion it needs to start — which could leave you stranded on the road. Always replace your spark plugs on time based on BMW’s recommendations.

What do I do if I see a pool of liquid under my BMW 840i xDrive?

Don't ignore puddles of fluid under your BMW 840i xDrive. It could signal a coolant leak, brake fluid leak, or an oil leak. Let any one of these leaks linger and it could cause engine damage.

Are some driving habits better for my BMW 840i xDrive engine than others?

Hard starts and stops put extra wear and tear on engine components. Smooth, gradual starts and stops, on the other hand, are a great way to help your engine run better. They can also help maximize your fuel economy.

Where can I get a BMW 840i xDrive tune-up?

At the nearest Firestone Complete Auto Care! We’re ready to help service, maintain, and repair your BMW 840i xDrive.

How often should I clean my BMW 840i xDrive fuel injectors?

The cleaning schedule for vehicle fuel injectors varies depending on your driving conditions and the type of fuel you use. Some manufacturers suggest cleaning your fuel system as part of routine maintenance, while others will recommend it on an as-needed basis if you’re experiencing poor performance. Reference your BMW owner’s manual for exact guidelines.

Who performs BMW 840i xDrive tune-ups?

When your 840i xDrive needs a tune-up, head to your local Firestone Complete Auto Care. Check out our latest offers to save on your service and schedule an appointment online.

Engine Tune-Up Service for Your 2025 BMW 840i xDrive

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Schedule an Appointment for Your BMW 840i xDrive Tune-Up

If your 840i xDrive is acting strange or making new noises, it could be engine tune-up time. Don’t wait until small problems get bigger. Make an appointment now.

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Tune-Ups to Help Your BMW 840i xDrive Run Better

Is it tune-up time? If you usually wait until your car has an issue to take it in for service, it might be time to change your ways, especially if you drive a 2025 BMW 840i xDrive. Periodic tune-ups can bring more power back to your 840i xDrive’s engine. They're designed to help your engine start easier and run more efficiently, which can mean better fuel economy (a win for you) and lower emissions (a win for the environment). When you take your car for regular engine tune-ups as recommended by BMW, you’re taking vital steps toward keeping your 840i xDrive’s engine running smoother, longer.

BMW 840i xDrive Engine Tune-Up Services

Your nearest Firestone Complete Auto Care location has several options to choose from when it comes to BMW 840i xDrive engine tune-up services. One option is the standard Firestone Tune-Up. The standard Firestone Tune-Up includes new spark plugs (and installation!), a thorough inspection of engine components, and a lifetime parts warranty*. The second service focuses on your 840i xDrive's filters, specifically replacing the air filter and fuel filter. The third tune-up option is a fuel system cleaning service, which is a three-step process that removes varnish, dirt, and carbon deposits on your 840i xDrive's fuel injectors, throttle body, and throttle plate. This can improve your fuel system’s performance (and therefore, your engine’s performance). Keep in mind that your 840i xDrive's mileage and maintenance history can uniquely impact its tune-up needs. This means that a tune-up service that’s a great fit for another car may not be optimal for yours. Talk to a technician about your driving style, mileage, and service history to learn more about your vehicle's specific needs.

Where to Get a Tune-Up for Your BMW 840i xDrive

Schedule your next 2025 840i xDrive engine tune-up service at Firestone Complete Auto Care. Consult your vehicle’s recommended service schedule from BMW, or make a service appointment if you notice any of these symptoms from your engine: shaking while the engine is idling, poor fuel economy, engine knocking, or an illuminated check engine light.

*Ask a Firestone Complete Auto Care teammate about full terms and conditions for warranties.

2025 BMW 840i xDrive Engine Tune-Up Q&A

Will it hurt my BMW 840i xDrive to drive with old spark plugs? Replace spark plugs on time or about every 30,000 miles or so. Without the spark of electricity created by spark plugs, your engine doesn’t have the combustion it needs to start — which could leave you stranded on the road. Always replace your spark plugs on time based on BMW’s recommendations.
What do I do if I see a pool of liquid under my BMW 840i xDrive? Don't ignore puddles of fluid under your BMW 840i xDrive. It could signal a coolant leak, brake fluid leak, or an oil leak. Let any one of these leaks linger and it could cause engine damage.
Are some driving habits better for my BMW 840i xDrive engine than others? Hard starts and stops put extra wear and tear on engine components. Smooth, gradual starts and stops, on the other hand, are a great way to help your engine run better. They can also help maximize your fuel economy.
Where can I get a BMW 840i xDrive tune-up? At the nearest Firestone Complete Auto Care! We’re ready to help service, maintain, and repair your BMW 840i xDrive.
How often should I clean my BMW 840i xDrive fuel injectors? The cleaning schedule for vehicle fuel injectors varies depending on your driving conditions and the type of fuel you use. Some manufacturers suggest cleaning your fuel system as part of routine maintenance, while others will recommend it on an as-needed basis if you’re experiencing poor performance. Reference your BMW owner’s manual for exact guidelines.
Who performs BMW 840i xDrive tune-ups? When your 840i xDrive needs a tune-up, head to your local Firestone Complete Auto Care. Check out our latest offers to save on your service and schedule an appointment online.

Maintenance for Your 2025 BMW 840i xDrive

We know it’s not just a car, it’s your car. We’ll help you properly maintain your BMW 840i xDrive to keep it on the road and running smoothly. Learn more about maintenance below.

Repair Service for Your 2025 BMW 840i xDrive

Nothing lasts forever. Even your BMW 840i xDrive's many parts and pieces. When something breaks, we're ready. Click on a repair below to learn more about 2025 BMW 840i xDrive repairs.