Mercedes-Benz Turbocharger Guide — OM651, OM936, OM471, DD13 & Passenger Car Series | HHX PARTS

Mercedes-Benz Turbochargers: From the Sprinter Van to the Actros Heavy Truck

Mercedes-Benz operates the world’s most comprehensive commercial vehicle lineup — from the Sprinter panel van that dominates last-mile delivery across Europe and North America, through the Actros long-haul tractor that set the benchmark for European heavy trucks, to the OM471/OM936 engines powering Arocs construction tippers on building sites worldwide. The same engineering excellence extends to their passenger car turbocharged engines — the OM651 2.1L diesel that powered three generations of C, E, and S-Class, and the M270/M274 petrol family in the current GLC, C-Class, and GLE range.

At HHX PARTS, we stock turbocharger units for the Mercedes-Benz Detroit DD13 heavy truck platform and supply to order across the full Mercedes-Benz engine range — passenger car, commercial van, medium truck, heavy truck, and bus applications. This guide gives workshops, distributors, and fleet operators the complete OEM cross-reference and sourcing framework for Mercedes-Benz turbochargers.

Mercedes-Benz Engine Family Overview

In-Stock Mercedes-Benz / Detroit Turbocharger Products

HHX PARTS currently stocks the following Mercedes-Benz and Detroit engine turbocharger products. For other engine families, we source and supply to order — contact our team with your OEM part number.

Detroit DD13 / Mercedes-Benz OM471 (12.8L) — BorgWarner B3G

The Detroit DD13 is the North American market version of the Mercedes-Benz OM471 — used in Freightliner Cascadia and Western Star trucks across the United States and Canada. The BorgWarner B3G is the OEM turbocharger on both the European Actros and the North American Cascadia DD13.

• B3G Turbocharger Cartridge / CHRA A4710964399 / 13879880047 / 13879880050 — For Detroit DD13, Freightliner Cascadia, Mercedes-Benz Bus 12.8L OM471-based engine — CHRA (Centre Housing Rotating Assembly) cartridge replacement
• B3G Turbocharger 4628332 — For Detroit Mercedes-Benz 12.8L 457HP Freightliner — complete turbocharger assembly replacement

For Mercedes-Benz OM651 passenger car/Sprinter (A651090xxxx), OM936 medium truck (A936090xxxx), OM471 Actros heavy truck (A471096xxxx), OM642 V6 diesel, M270/M274 petrol, and all other Mercedes-Benz engine families — contact our technical team with your A-number OEM part reference or vehicle VIN. We source and supply to order with competitive lead times. All enquiries answered within 24 hours.

OM651 — The World’s Most Widely Deployed Mercedes-Benz Diesel Engine

The OM651 2.1L four-cylinder diesel was Mercedes-Benz’s flagship passenger car diesel engine from 2008 to 2019 — fitted to over 3 million vehicles across the C-Class (W204/W205), E-Class (W212/W213), GLC (X253), GLE (W166), S-Class (W221), and the Sprinter van (906/907) generation. The OM651 turbocharger is one of the highest-volume aftermarket SKUs in the European premium diesel vehicle category.

OM651 Key OEM Turbocharger References

OM651 Failure Patterns

• VNT vane carbon fouling — the OM651’s variable-nozzle turbocharger is highly susceptible to carbon deposit accumulation on the vane mechanism in stop-start urban driving cycles; symptoms are characteristic surging power delivery and sluggish low-RPM response; cleaning the vanes before replacement often resolves the issue without a full turbo change
• Oil feed banjo bolt restriction — the OM651 oil feed banjo bolt has a fine orifice (approximately 1.0 mm) that is easily blocked by carbonised oil; always replace when fitting a replacement turbo
• Wastegate actuator rod wear — common on higher-mileage OM651 engines; the actuator rod develops excessive play, causing overboost/underboost fault codes (P0234/P0299) before any mechanical turbo failure occurs

OM936 — Mercedes-Benz Medium Truck (Atego, Arocs, Citaro Bus)

The OM936 is Mercedes-Benz’s current-generation 7.7L six-cylinder medium truck diesel — used in the Atego medium truck (GVW 6–16 tonnes), Arocs construction truck (lower power variants), and Citaro city bus. The OM936 uses a Garrett or BorgWarner VGT turbocharger with electronic actuator control for precise boost management across all operating conditions.

OM936 Key OEM References

OM471 / Detroit DD13 — The Actros and Freightliner Flagship (In Stock)

The OM471 is Mercedes-Benz’s current-generation 12.8L heavy truck diesel — the heart of the Actros MP4 long-haul tractor (the best-selling European heavy truck). In North America, the same engine platform is sold as the Detroit DD13 in Freightliner Cascadia and Western Star trucks.

The BorgWarner B3G is the OEM turbocharger for both the European OM471 and the North American DD13. Key characteristics:

• Turbo model: BorgWarner B3G (variable geometry, electronically controlled)
• Compressor: high-efficiency aluminium compressor wheel
• VGT actuator: electronic stepper motor (requires calibration after replacement using Mercedes XENTRY or Detroit Diesel Diagnostic Link / DDDL)
• Oil feed: M16 banjo fitting (top of bearing housing)
• Boost pressure: 3.5–4.5 bar absolute at rated power

OM471 / DD13 OEM References (In Stock at HHX PARTS)

OM471 / DD13 Failure Patterns

• VGT actuator electronic failure — the most common failure mode on OM471/DD13; the stepper motor actuator develops position drift fault codes (SPN 677, SPN 641 on DD13) without mechanical turbo failure; actuator replacement is significantly cheaper than full turbo replacement
• Oil coking after hot shutdown — Actros trucks that are shut down immediately after motorway running accumulate oil coking in the B3G feed passages; implement a 5-minute idle cool-down policy for fleet Actros operations
• Compressor wheel erosion on DD13 in dusty US Southwest operations — Freightliner Cascadia trucks operating in Arizona, New Mexico, and Texas construction applications show elevated compressor wheel erosion compared to the European Actros fleet baseline

Mercedes-Benz Turbocharger OEM Part Number System

Mercedes-Benz uses a standardised A-number system for all OEM parts:

• A + 10 digits — e.g. A6510903380: first 3 digits after A identify the engine/system group (651 = OM651, 936 = OM936, 471 = OM471); next 2 digits identify the component group (09 = turbocharger); remaining digits identify the specific variant
• Supersession tracking — Mercedes-Benz regularly supersedes A-numbers when they upgrade or revise parts; a 2012-build C220d and a 2017-build C220d OM651 may carry different A-numbers for the same physical turbocharger
• Detroit cross-references — the DD13 and DD15 carry independent Detroit Diesel part numbers (4-7 digit format, e.g. 4628332) that cross to the same BorgWarner B3G unit used in the European OM471
• Always specify VIN or engine serial number — Mercedes-Benz A-numbers are sometimes production-year-specific; VIN lookup is the most reliable method to confirm the correct turbocharger for a specific vehicle

Installation Notes for Mercedes-Benz Turbochargers

1. Oil and filter change mandatory — use Mercedes-Benz approved 229.51 or 229.52 full-synthetic oil; non-specification oil accelerates bearing wear on all Mercedes turbos
2. Replace oil feed line and banjo bolt — particularly critical on OM651 where the small banjo bolt orifice restricts flow when partially coked
3. Pre-lubricate through oil inlet port — pour approximately 30 ml clean fresh oil and rotate shaft by hand before installation
4. Crank without start to prime — disable fuel delivery via Mercedes XENTRY or remove fuel pump fuse; crank 10–15 seconds before starting
5. Idle 5 minutes before driving — do not apply load until oil has reached operating temperature
6. Calibrate VGT actuator via XENTRY (passenger car) or DDDL (DD13) — essential after fitting any new turbocharger with VGT; the ECU must learn the new actuator’s position range before normal boost control resumes
7. OM471/DD13: recalibrate via Detroit Diagnostic Link — after fitting B3G CHRA or complete assembly, perform “Turbocharger Actuator Calibration” via DDDL 8.x software before returning to service

Why HHX PARTS for Mercedes-Benz Turbochargers?

• Detroit DD13 B3G in stock — the B3G CHRA cartridge (A4710964399) and complete assembly (4628332) are maintained in ready stock for the North American heavy truck market
• Full Mercedes-Benz engine coverage on enquiry — OM651, OM654, OM642, OM936, OM471, OM473, M270, M274 and all passenger car petrol families — we source to order with competitive lead times
• Mercedes A-number and Detroit DD cross-referencing — by VIN, A-number, engine code, or vehicle model and year
• New OEM-grade BorgWarner and Garrett-type units — dynamically balanced before dispatch; CHRA cartridges manufactured to OEM bearing clearance specification
• Factory-direct pricing — significant savings versus Mercedes-Benz dealer parts pricing or North American independent turbo rebuilder pricing
• Global supply — serving independent Mercedes-Benz workshops in Europe, Actros fleet operators in the Middle East and Africa, and Freightliner/DD13 fleet service operations in North America

Further Reading

• BMW Turbocharger Complete Product Guide — N20, N47, B47, B48, B58
• Audi Turbocharger Complete Product Guide — 1.9 TDI, 2.0 TFSI, 3.0 TDI V6
• Volvo D12 & D13 Turbocharger Guide — European Heavy Truck
• Middle East Turbocharger Sourcing Guide — Actros fleet demand in Saudi Arabia & UAE
• The Complete Turbocharger Buyer’s Guide: 8 Costly Mistakes to Avoid
• The Complete Turbocharger Maintenance Manual

Request a Quote for Your Mercedes-Benz Turbocharger

Tell us your Mercedes-Benz A-number OEM reference, Detroit DD part number, vehicle VIN, or engine code — and we will confirm the correct unit, availability, and pricing within 24 hours. For DD13 B3G units, we have stock ready to ship.

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• Website: www.hhxparts.com