October 22, 2026
What is a remanufactured car engine?October 21, 2026
What is engine assembly?Developed in 2004 to replace the previous-generation N42B20 engine, the BMW N46B20 was BMW’s primary inline-four naturally aspirated engine in the mid-to-late 2000s:
Technical Evolution: Building on the N42, the N46 featured improvements to the crankshaft, connecting rods, valve cover, and valve train, resolving the early N42’s susceptibility to chain skipping and
overheating of the Valvetronic servo motor.
Core Technology: It marked the first widespread implementation of BMW’s first-generation Valvetronic (continuously variable valve lift) and Double-VANOS (dual variable valve timing) technologies,
which eliminated the need for a throttle valve to control air intake, significantly improving fuel economy.
Technical Specifications：
| Attribute Item | Detailed Specifications |
| Engine Model | BMW N46B20 (A / B / C / E / BZ) |
| Intake System/Displacement | Naturally Aspirated / 1,995 cc (2.0L) |
| Cylinder Configuration/Number of Valves | Inline 4 / 16 (DOHC) |
| Core Technology | Valvetronic + Double-VANOS |
| High-Power Version Output (20i Class) | 110 kW (150 HP) or 115 kW (156 HP) @ 6400 rpm | 200 N·m @ 3600 rpm |
| Low-Power Version Output (18i Class) | 95 kW (129 HP) or 100 kW (136 HP) @ 5750 rpm | 180 N·m @ 3250 rpm |
| Bore × Stroke/Compression Ratio | 84.0 mm × 90.0 mm / 10.5:1 |
| Compatible Drive Types | Primarily designed for rear-wheel drive (RWD / sDrive) |
Vehicle Compatibility
The N46B20 engine is widely used in BMW’s previous-generation classic platforms (E-series):
For BMW 3 Series (E90 / E91 / E92 / E93): 318i / 320i [2005–2012]
For BMW 3 Series (E46): 318i / 318Ci (later models equipped with the N46) [2004–2005]
For BMW 5 Series (E60): 520i [2007–2010]
For BMW 1 Series (E81 / E87 / E82 / E88): 118i / 120i [2004–2011]
For BMW X3 Series (E83): X3 2.0i / xDrive20i [2005–2010]
For BMW X1 Series (E84): sDrive18i [2009–2015]
For BMW Z4 Series (E85): Z4 2.0i [2005–2008]
| Engine Version | Power Specifications | Model Series | Chassis Code | Compatible Models | Production Years |
| Low-Power Version (N46B20C/E/BZ) | 129 HP / 136 HP 180 N·m | 3 Series | E90 / E91 | 318i / 318i Touring | 2005–2011 |
| 3 Series | E46 | 318i / 318Ci | 2004–2005 | ||
| 1 Series | E81 / E87 | 118i (3-door / 5-door models) | 2004–2011 | ||
| X1 Series | E84 | sDrive18i (2WD) | 2009–2015 | ||
| High-Power Version (N46B20A/B) | 150 HP / 156 HP 200 N·m | 3 Series | E90 / E91 | 320i Sedan / Touring | 2005–2012 |
| E92 / E93 | 320i Coupe / Convertible | ||||
| 3 Series | E46 | 320i / 320Ci | 2004–2005 | ||
| 5 Series | E60 | 520i | 2007–2010 | ||
| 1 Series | E81 / E87 | 120i Hatchback | 2004–2011 | ||
| E82 / E88 | 120i Coupe / Convertible | ||||
| X3 Series | E83 | X3 2.0i / xDrive20i | 2005–2010 | ||
| Z4 Series | E85 | Z4 2.0i (Roadster ) | 2005–2008 |
Product Details:
Fitment / Compatible Vehicles
The N46B20 is widely compatible with mainstream BMW E-platform models produced from 2004 to 2015:
BMW 1 Series: E81 / E82 / E87 / E88 (118i, 120i) (2004–2013)
BMW 3 Series: E46 (318i, 318Ci – late 2004+); E90 / E91 / E92 / E93 (318i, 320i) (2005–2012)
BMW 5 Series: E60 (520i) (2007–2010)
BMW X1: E84 sDrive18i / xDrive18i (2009–2015)
BMW X3: E83 2.0i (2005–2010)
BMW Z4: E85 2.0i (2005–2008)
OE/OEM Part Numbers
Engine Assembly / Complete Engine
11000415053 / 11-00-0-415-053
11000415049 / 11000415050
11000392339 / 11000392340
11002157853 / 11002157854
Short Block :
11110415055 / 11110392342
Engine Codes / Cross Reference :
N46B20A, N46B20B, N46B20C, N46B20CB, N46B20, BMW 2.0 N46
Quality Assurance & Testing Procedure：
Cylinder Inspection: Endoscope check to ensure zero scratches inside the cylinders.
Pressure Test: Cylinder pressure and oil pressure tested within factory standards.
Crankshaft & Timing Check: Replaced with fresh oil seals and verified timing chain kit.
Pre-Shipment Video: We send a live test video of your specific engine unit before crating.
Packaging & Logistics：
Protective Packaging: Sealed in anti-rust vapor barrier bag, placed inside a heavy-duty ISPM-15 certified export wooden crate.
Lead Time: 5–10 working days for processing and testing.
Shipping Methods: Air Freight (DDP/DAP) for urgent orders; Sea Freight for bulk/B2B orders.
FAQ Section：
Q: How do I make sure this engine fits my vehicle?
A: Please send us your 17-digit Vehicle Identification Number (VIN) or frame number via live chat or order notes. Our technical team will verify compatibility within 10 minutes.
Q: Is this a complete long block or short block?
A: We offer both options. The standard listing is for a complete engine assembly (Long Block with cylinder head, oil pan, and timing system). External accessories like turbochargers, alternators, and starter motors can be included upon request.
Q: What is the warranty policy?
A: We provide a 12-month limited warranty covering core internal components (crankshaft, pistons, camshafts, block). Warranty claims require proof of installation by a certified mechanic.
100% Fitment Guaranteed: Checked via VIN before shipping.
12-Month Warranty: Full quality assurance.
Strict QC Passed: Compression test & endoscope inspection video provided.
Global Express & Sea Freight: Door-to-door delivery with customs clearance support.
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