The BMW N26 is a 2.0-liter twin-scroll turbocharged inline-four engineered to meet California's stringent SULEV (Super Ultra Low Emissions Vehicle) standards. Mechanically it is a close sibling of the N20, sharing the same core architecture and performance figures while adding emissions hardware required for sale in California and the states that follow CARB regulations.
What the N26 Is
When BMW rolled out its downsized turbo-four to replace naturally aspirated sixes, it produced two closely related variants: the widely distributed N20 and the SULEV-certified N26. The N26 exists specifically so that BMW could sell four-cylinder models in emissions-restricted markets without sacrificing the driving character enthusiasts expected. Functionally the two are near-identical from behind the wheel, but the N26 carries additional emissions equipment, revised calibration, and hardware tuned for cleaner tailpipe output.
Engineering & Specs
The N26 pairs a twin-scroll turbocharger with direct injection and BMW's Valvetronic and Double-VANOS systems, delivering strong low-end torque and a willing top end.
- Configuration: 2.0L turbocharged inline-four
- Induction: Twin-scroll turbocharger
- Output: 240 hp
- Torque: 255 lb-ft
- Redline: 7,000 rpm
- Production: 2012–2017
That combination of 255 lb-ft available across a broad plateau and a 7,000-rpm ceiling gives the N26 a flexible, responsive personality that belies its modest displacement.
Which BMWs Used It
The N26 appeared in SULEV-designated versions of several mainstream BMWs:
- 228i (SULEV)
- 328i (SULEV)
- 428i (SULEV)
- 528i (SULEV)
Because fitment depended on where the car was originally sold, two seemingly identical BMWs can carry different engines. If you're unsure whether a specific car has an N26 or an N20, run the vehicle through our VIN decoder to confirm the exact engine code before buying.
Reliability & Ownership Notes
The N26 shares the N20's well-documented service considerations. The timing chain and its guides deserve attention, as does the water pump, and like most direct-injection engines it benefits from periodic intake maintenance. Staying disciplined with oil changes and keeping an eye on the cooling system pays dividends over the long haul.
For buyers, the SULEV certification carries an extended emissions warranty in applicable states, which can be a genuine advantage. Verify that emissions components are original or properly serviced, since some SULEV-specific parts can be pricier than their standard N20 equivalents.
Legacy
The N26 represents BMW's commitment to keeping performance-oriented four-cylinders on sale in the strictest emissions markets, a philosophy that echoes across the brand's lineup from small turbos to the big V8s and V12s. Explore related powerplants like the N63 and N62, or dive deeper into BMW's engine family in our BMW DNA encyclopedia.