Which BMW M550i generation is the most reliable?

In our guide, the M550i G30 facelift (2021 to 2023): its reliability score runs 67 to 68 of 100 across its model years. The lowest is the M550i G30, at 64 to 66.

What goes wrong on a BMW M550i?

M550i G30 facelift: valve stem seals (about $4,000), oil and coolant leaks (about $1,500). M550i G30: valve stem seals (about $4,000), oil and coolant leaks (about $1,500).

Which BMW M550i years should I avoid?

No M550i model year in our guide is held back by a specific problem; the gaps between years come from age.

What is the best BMW M550i year to buy?

By our Guide Score, which weighs desirability, driving and reliability, the 2023 M550i G30 facelift, at 59 of 100. Best year of each generation: M550i G30 facelift 2023 (59), M550i G30 2020 (57).

Problems by generation

BMW M550i problems by generation

The known problems on all 2 M550i generations in our guide (G30 and G30 facelift): what a fix costs, how each one scores on reliability, and which model years to skip.

M Performance2 generations, 2018 to 2023

Most reliableM550i G30 faceliftReliability 67 to 68Least reliableM550i G30Reliability 64 to 66Highest Guide Score2023 M550i G30 faceliftGuide Score 59 Mixed Costliest known repairValve stem seals$4,000 on the M550i G30 facelift

Every M550i generation at a glance

Generation	Reliability	Costliest known repair	Best year
M550i G30 facelift2021 to 2023	67 to 68Moderate	Valve stem seals$4,000	2023Score 59
M550i G302018 to 2020	64 to 66Moderate	Valve stem seals$4,000	2020Score 57

Reliability is out of 100, for the range of a generation's model years: its engine, its own known problems and their bills, parts and service costs, and age. Repair figures are the guides' estimates for an independent shop, not quotes. How the scores work

Which M550i years to skip

Generation	Best year	Weaker years, and why
M550i G30 facelift2021 to 2023	2023 (59)	2021 (Guide Score 59) score close to the best, but check for fuel injectors corroded by coolant.
M550i G302018 to 2020	2020 (57)	2018 (Guide Score 56) score close to the best, but check for passenger seat occupancy mat.

Most of the gap between years is age. A year is listed when the score charges it for something specific: a different engine, a problem that hit only some years, or a gearbox that came later. The same list for every car is on the best and worst years.

Before you choose

Tip

A well-kept car from a weaker generation can be a better buy than a neglected one from the best. Each guide has the full problem list with how to check for each, and Score a listing rates one car for sale.

Head to head

M550i vs M5

Every M550i generation at a glance

The worst known problems on each M550i

Which M550i years to skip

Before you choose