BMW · Known Issues

2024 BMW 8 Series Problems: 6 Known Issues

2024 model year · 345+ owner reports · Updated August 2026

According to Au7o's analysis of 345+ owner reports, the 2024 BMW 8 Series has 6 documented known issues, with 2 rated critical. The most serious are N63TU3 Valve Stem Seal Failure & Oil Consumption (M850i) ($3,500-$10,000 repair) and N63TU3 Timing Chain Guide Wear (M850i) ($4,000-$7,500 repair). The most commonly reported issue is N63/S63 V8 Oil Consumption in M850i with 140 owner reports. Across all issues with published estimates, repair costs range from $150 to $10,000. DIY maintenance guides at au7o.io.

Frequently Asked Questions

What are the most common BMW 8 Series problems?

According to Au7o's analysis of 345+ owner reports, the 2024 BMW 8 Series has 6 documented issues. The most frequently reported are: N63TU3 Valve Stem Seal Failure & Oil Consumption (M850i), N63TU3 Timing Chain Guide Wear (M850i), N63/S63 V8 Oil Consumption in M850i. Of these, 2 are rated critical and should be addressed promptly.

Is the BMW 8 Series reliable?

The 2024 BMW 8 Series has 6 known issues documented across 345+ owner reports. 2 issues are rated critical: N63TU3 Valve Stem Seal Failure & Oil Consumption (M850i) and N63TU3 Timing Chain Guide Wear (M850i). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common BMW 8 Series problems?

Repair costs for known BMW 8 Series issues range from $150 to $10,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, N63TU3 Valve Stem Seal Failure & Oil Consumption (M850i), typically costs $3,500-$10,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2019-2024 BMW 8 Series N63TU3 Valve Stem Seal Failure & Oil Consumption (M850i)?

The N63TU3 4.4L twin-turbo V8 in M850i models suffers from premature valve stem seal degradation caused by the hot-V turbo placement. Turbochargers mounted between the cylinder banks create extreme heat that accelerates valve stem seal hardening and failure, allowing oil to leak… Repairs typically run $3,500-$10,000. Severity: high.

What is the 2019-2024 BMW 8 Series N63TU3 Timing Chain Guide Wear (M850i)?

The N63TU3 4.4L twin-turbo V8 in M850i models uses plastic timing chain guides that wear prematurely under the extreme heat and stress of the hot-V configuration. As the plastic guides wear, the timing chain develops slack, causing rattling on cold starts and eventually risking t… Repairs typically run $4,000-$7,500. Severity: high.

What is the 2019-2025 BMW 8 Series N63/S63 V8 Oil Consumption in M850i?

The M850i equipped with the N63TU4 twin-turbo V8 carries forward the oil consumption tendencies of the N63 engine family, though the TU4 revision is improved over earlier versions. Oil consumption of 1 quart per 3,000-5,000 miles is still common and considered within BMW's specif… Repairs typically run $500-$5,000. Severity: medium.

What is the 2019-2025 BMW 8 Series B58 Engine Coolant Loss from Expansion Tank and Water Pump?

The 840i with B58 inline-six turbo engine experiences coolant loss primarily from the plastic expansion tank cracking and the electric water pump connection failing. The expansion tank develops hairline cracks at the weld seams that are nearly invisible until significant coolant… Repairs typically run $350-$800. Severity: medium.

What is the 2019-2025 BMW 8 Series Adaptive Suspension Damper Malfunction?

The 8 Series equipped with Adaptive M Suspension experiences electronic damper failures, particularly in the rear. The electronically controlled dampers use solenoid valves to adjust firmness in real-time, and these solenoids can fail from fluid contamination or electrical faults… Repairs typically run $800-$2,000. Severity: medium.

What is the 2019-2024 BMW 8 Series Premature Tire Wear (All 8 Series & M8)?

All 8 Series and M8 models experience premature tire wear, particularly on the rear tires, due to aggressive factory alignment settings. The rear suspension uses approximately -2.0 degrees of negative camber from the factory, which causes rapid inner edge tire wear. Rear tires co… Repairs typically run $150-$2,400. Severity: low.

2024 BMW 8 Series Problems: 6 Known Issues

All 6 Known Issues

When Issues Typically Appear

2019-2024 BMW 8 Series: N63TU3 Valve Stem Seal Failure & Oil Consumption (M850i)#

Common Symptoms

How to Fix

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2019-2024 BMW 8 Series: N63TU3 Timing Chain Guide Wear (M850i)#

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2019-2025 BMW 8 Series: N63/S63 V8 Oil Consumption in M850i#

Common Symptoms

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2019-2025 BMW 8 Series: Adaptive Suspension Damper Malfunction#

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2019-2024 BMW 8 Series: Premature Tire Wear (All 8 Series & M8)#

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2019-2025 BMW 8 Series: B58 Engine Coolant Loss from Expansion Tank and Water Pump#

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What you need to fix it

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Other BMW Models

Frequently Asked Questions

What are the most common BMW 8 Series problems?

Is the BMW 8 Series reliable?

How much does it cost to fix common BMW 8 Series problems?

What is the 2019-2024 BMW 8 Series N63TU3 Valve Stem Seal Failure & Oil Consumption (M850i)?

What is the 2019-2024 BMW 8 Series N63TU3 Timing Chain Guide Wear (M850i)?

What is the 2019-2025 BMW 8 Series N63/S63 V8 Oil Consumption in M850i?

What is the 2019-2025 BMW 8 Series B58 Engine Coolant Loss from Expansion Tank and Water Pump?

What is the 2019-2025 BMW 8 Series Adaptive Suspension Damper Malfunction?

What is the 2019-2024 BMW 8 Series Premature Tire Wear (All 8 Series & M8)?