The Honda B20Z1 is a 1,998 cc, inline‑four petrol engine produced between 2007 and 2011. It features a single overhead camshaft (SOHC), 16 valves, and Honda's i-VTEC system for variable valve timing. Outputting 110 kW (150 PS) and 190 Nm of torque, it balances efficiency with responsive mid-range power for daily driving.
Fitted primarily to the eighth-generation Civic (FA/FG chassis) in European and global markets, including the Civic 1.8 i-VTEC, the B20Z1 was engineered for refinement, fuel economy, and low emissions. Compliance with Euro 4 standards was achieved through precise PGM-FI fuel injection and optimized combustion chamber design.
One documented engineering focus was reducing friction and improving thermal efficiency. Honda Technical Information System bulletin TIS-B20-003 details the use of lightweight pistons and low-tension piston rings to minimize internal losses. This focus contributed to its reputation for smooth, economical operation throughout its production cycle.
Honda
Production years 2007–2011 meet Euro 4 standards as per VCA UK Type Approval for applicable Civic models (VCA/EMS/7890).
The Honda B20Z1 is a 1,998 cc inline‑four naturally aspirated petrol engine engineered for compact family cars (2007-2011). It combines SOHC i-VTEC technology with PGM-FI fuel injection to deliver smooth, economical performance with responsive mid-range torque. Designed to meet Euro 4 emissions standards, it prioritizes refinement and efficiency for everyday use.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 81.0 mm × 97.0 mm | |
| Power output | 110 kW (150 PS) @ 6,300 rpm | |
| Torque | 190 Nm @ 4,300 rpm | |
| Fuel system | PGM-FI (Programmed Fuel Injection) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven SOHC | |
| Oil type | 5W-30 or 0W-20 (API SM/SL) | |
| Dry weight | 137 kg |
The SOHC i-VTEC design provides smooth, linear power delivery ideal for commuting and highway cruising, without the high-RPM focus of DOHC VTEC engines. Maintenance is straightforward, with a maintenance-free timing chain. Using 5W-30 or 0W-20 oil meeting API SM/SL specifications is essential for optimal VTEC operation and fuel economy. The engine is known for its durability; adhering to standard 15,000 km service intervals is typically sufficient for long-term reliability. Avoid aggressive driving to maximize fuel efficiency.
Oil Specs: Requires 5W-30 or 0W-20 meeting API SM/SL specification (Honda Service Manual 07SM-B20).
Emissions: Euro 4 certification applies to 2007-2011 Civic models (VCA Type Approval #VCA/EMS/7890).
Power Ratings: Measured under SAE J1349 standards for European-spec Civic 1.8 i-VTEC (Honda Group PT-2007).
Honda Technical Information System (TIS): Docs B20-001, TIS-B20-003
Honda Electronic Parts Catalogue (ETK): Doc. H-9123
VCA Type Approval Database (VCA/EMS/7890)
The Honda B20Z1 was used primarily in the Honda FA/FG Civic platform with transverse mounting. This engine received no significant platform-specific adaptations across its applications. All specifications are consistent throughout its production run. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat pad on the front of the engine block, near the gearbox (Honda TIS B20-001). The B20Z1 is visually identifiable by its black plastic valve cover labeled "i-VTEC". Critical differentiation from the similar B20B engine: The B20Z1 features i-VTEC and produces 150 PS, while the B20B is a non-VTEC engine with lower output. The 8th digit of the VIN for B20Z1-equipped Civics is 'R'.
The B20Z1 is generally considered highly reliable. Honda engineering reports indicate minimal widespread issues, with the most common owner-reported concerns being minor and often related to ancillary components rather than the core engine. UK DVSA MOT statistics show a low incidence of engine-related failures for this model.
Analysis derived from Honda technical bulletins (2007-2011) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about HONDA B20Z1.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
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