Product Overview:
This is a TD04 turbocharger from Mitsubishi Heavy Industries — one half (left-side) of BMW’s factory twin-turbo N54B30 setup used across the 135i and 335i. It restores factory boost pressure, throttle response, and power delivery for vehicles suffering from turbo lag, boost leaks, unusual noise, or a fully failed unit — common wear points on these turbos as mileage accumulates.
Key Features:
- OEM-Matched Fitment: Manufactured to match the mounting configuration and flange dimensions of the original 49131-07000 turbocharger for a direct bolt-on replacement.
- Genuine MHI TD04 Platform: The factory-fitment turbo design used across BMW’s N54 twin-turbo engine, known for strong performance and a large aftermarket support ecosystem.
- Ball-Bearing Variants Available: Some suppliers offer ball-bearing “hybrid” versions of this turbo (vs. standard journal bearing) for improved spool response — confirm which type you’re listing, since both are sold under overlapping part numbers.
- Durable Construction: Turbine and compressor components built to withstand the sustained heat and pressure cycles typical of a turbocharged performance engine.
- Restores Lost Power & Efficiency: Addresses common failure symptoms — reduced power, boost leaks, unusual noise, and check-engine codes.
- Important — Sold as Left-Side Unit: This part number corresponds to one side of BMW’s twin-turbo setup; a complete repair typically requires both the left (49131-07000 family) and right (49131-07041 family) turbos as a matched pair.
- Note on Upgrade Variants: Some suppliers also offer “billet compressor wheel” upgraded versions of this turbo rated for significantly higher horsepower (450–750HP) for tuned applications. If you’re selling stock-replacement units, clarify that yours is OEM-spec to avoid confusion with these performance variants listed under overlapping part numbers.
Before You Buy:
Please confirm which side (left/right) you need, and cross-check the part number stamped on your original turbocharger, since the N54’s twin-turbo setup uses two distinct-but-related part number families. Let us know your vehicle’s VIN or chassis code (E82/E88/E90/E91/E92/E93) if you’d like help confirming exact compatibility before ordering.
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