McLaren 650s MP4-12C Turbocharger Left 4938906000

part number 49389-06000 identifies the Genuine Left Side (Nearside) Turbocharger for the McLaren Super Series, specifically the MP4-12C and 650S. Manufactured by Mitsubishi Heavy Industries (MHI), this unit is a TD04HL model designed to work in tandem with its right-side counterpart (49389-06010) to power the M838T 3.8L V8 engine.

Technical Specifications

Key Product Highlights

• Staggered Setup: Unlike many aftermarket systems, the 12C/650S uses a mirror-image setup. The 49389-06000 is strictly for the Left side; the housing and rotation are specific to that bank of the engine.

• MHI TD04HL Architecture: Known for its extremely fast spool-up times and reliable journal bearing design. It uses a high-efficiency turbine wheel capable of sustaining boost levels required for the 650S’s 641 hp peak.

• Direct OEM Fit: This unit includes the integrated electronic wastegate actuator mounting points and the specific V-band flange connections for the McLaren factory headers.

Upgrade & Service Information

• Upgradability: The 49389-06000 housing is a popular choice for “Stage 2” or “Pure 900” builds. Specialist tuners often CNC-machine these factory housings to fit larger billet compressor wheels, allowing the 3.8L engine to support 800+ whp.

   

• Common Service Need: The most frequent point of failure is not the turbo itself but the electronic wastegate actuator. If you receive a “Boost Pressure Low” warning, it is often the actuator or a boost leak in the intercooler piping rather than the internal rotating assembly.

• Core Exchange: When purchasing a replacement, many vendors require a “Core Deposit.” You may need to return your damaged unit to receive a refund of approximately $1,500 – $3,000.

Comparison: Left vs. Right