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BMW · Sports Car · 2019–2026

BMW M8 G15

Weaknesses, engine ratings and buying advice

★★★★★
4.0 / 5.0 · Based on 2 engine variants

Generations

Engine Overview

The BMW M8 G15 is available with 2 engine variants — from 530 to 625 hp.

4.4L V8 Biturbo · Benziner· 600 PS
2019 2026
Be Careful 8 weaknesses
Show all weaknesses →
M850i · Benziner· 530 PS
2019 2026
Good Choice 5 weaknesses
Show all weaknesses →

The BMW 4.4L V8 Biturbo (Benziner, 600 PS) has the S63B44T4 (4.4L V8 Biturbo) — rated: "Be Careful", 8 known weaknesses.

The BMW M850i (Benziner, 530 PS) has the N63B44TU3 (4.4L V8 Biturbo) — rated: "Good Choice", 5 known weaknesses.

Vehicle Weaknesses

WeaknessCost
●M Sport brakes: persistent squealing

The M Sport brakes squeal from day one, especially between 50 and 0 km/h. BMW rates this as normal. Pad cleaning and brake paste help only temporarily.

Symptoms: Continuous squealing when braking from medium speed, especially with cold brakes and after wet conditions.
Ad M8 G15 brake pad34117853006
 Medium
NHTSA Owner Complaints
Above Average
5 complaints · 2019–2026
Cruise Control
2 ⚠ 1
Electrical
1 ⚠ 1
Engine
1 ⚠ 1
Fuel System
1
Brakes
1

Top Reported Issues

⚠ Cruise Control (2 complaints)
⚠ Electrical (1 complaints)
⚠ Engine (1 complaints)
Source: NHTSA (nhtsa.gov) · 2026-03

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Known Problems and Issues

A total of 18 weaknesses have been documented for the BMW M8 G15 (2019–2026) — 13 engine-related and 5 vehicle-related. Typical issues affect Brakes, Electronics, Cooling, Suspension. Considered reliable: N63B44TU3 (4.4L V8 Biturbo).

M8 (S63B44T4, 2019–2026) — Be Careful: Connecting rod bearing wear (mitigated), High-pressure fuel pump (HPFP) failure, Turbo coolant lines V-valley heat damage. Power: 600 PS.

What to watch out for with the BMW M8? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions

What problems and weaknesses does the BMW M8 G15 have? +
The BMW M8 G15 has 13 known engine weaknesses and 5 vehicle weaknesses.
What should I look for when buying a used BMW M8 G15? +
faq.watch_a_solid
Which engine is recommended? +
Good choice: N63B44TU3 (4.4L V8 Biturbo). The most reliable engine is the N63B44TU3 (4.4L V8 Biturbo) with the lowest risk score. The most fun to drive is the S63B44T4 (4.4L V8 Biturbo).
Which BMW M8 G15 engine is the most reliable? +
The {code} ({displacement}) is the most reliable engine in the BMW M8 G15. It has the lowest risk score of all available engines and is rated "Good Choice". However, there are 5 known weaknesses to be aware of.
Which BMW M8 G15 engine is the most fun? +
The {code} ({displacement}) offers the most driving fun in the BMW M8 G15 — rated: "Legendary!". {description} 625 hp S63 in the M8 — acceleration described as 'simply perverse' (motor1). The 8 Series format showcases the engine as no SUV can. GT sports car at the highest level.
Is the BMW M8 G15 worth buying used? +
The BMW M8 G15 is a good choice as a used car — 1 of 2 engine variants are rated 'Good Choice'.
What horsepower variants are available for the BMW M8 G15? +
The BMW M8 G15 is available with engine variants from 530 to 625 hp. Petrol: N63B44TU3 (4.4L V8 Biturbo), S63B44T4 (4.4L V8 Biturbo).

Last updated: February 2026 · All information without guarantee