New BMW M5 4.4 V8 Turbo – Ref. 800075-5012S

Diagnosing a failing turbo on a BMW M5 before any replacement

Before ordering a new turbo for your BMW M5, it is essential to confirm that the turbo is actually the cause of the problem. On this high-performance saloon fitted with the V8 bi-turbo engine, characteristic signs include a loss of power at high revs, blue or black smoke from the exhaust, an unusual whistling noise on the intake side, or an engine warning light accompanied by a fault code related to boost pressure. Checking the oil pressure, visually inspecting the axial play of the turbo shaft, and verifying that there is no abnormal radial play will help rule out other causes — such as split hoses, a faulty sensor, or an intake leak — before confirming that the turbocharger needs replacing.

About the new turbo for the BMW M5

This turbo fits the S63 TU Left engine, with a capacity of 4.4 litres. It is a new turbo, compatible with reference 800075-5012S, designed to restore the original performance expected from this petrol V8 bi-turbo engine. This BMW model, renowned for its sporting character, places considerable demands on both turbochargers, making the quality of the replacement part critical to engine reliability.

Engine compatibility and reference verification

This new turbo is compatible with the M5 4.4 V8 Bi-Turbo engine, engine code S63, petrol-fuelled, with a displacement of 4395 cm³. Before placing an order, it is strongly recommended that you verify the reference marked on your old turbo or on the vehicle's identification plate, as technical revisions may differentiate several turbo variants depending on the side (left or right) and the version of the S63 engine.

Warranty and delivery of this BMW M5 turbo

This new turbo is sold as a straightforward purchase: there is nothing to return — no collection or return of the old turbo is required. A single delivery is made, consisting of the new turbo. This turbo comes with a 12-month parts warranty, subject to fitting being carried out by a qualified professional. Payment can be spread over up to 10 instalments.

Tips for a reliable installation on the S63 engine

Turbo failure on this type of turbocharged engine is most commonly caused by inadequate lubrication, oil that does not meet the manufacturer's specifications, overdue oil changes, or a clogged air filter. Before fitting, check the oil circuit, the condition of the hoses, and the cleanliness of the air intake to avoid any contamination of the new turbo. When starting the engine for the first time, prime the lubrication circuit with oil before the initial start-up, and drive gently during the first few kilometres to protect the new part.