The Vauxhall B16LES is a 1,598 cc, inline‑four naturally aspirated petrol engine produced between 2015 and 2021. It features a dual overhead camshaft (DOHC) 16‑valve layout with sequential multi‑point fuel injection, delivering 88 kW (120 PS) and 155 Nm of torque. The use of a lightweight aluminium block and chain‑driven DOHC enables compact packaging and reduced internal friction for improved urban fuel economy and smooth operation.
Fitted to models such as the Corsa…
All production years (2015–2021) meet Euro 6 emissions standards (VCA UK Type Approval #VCA/EMS/9878).
The Vauxhall B16LES is a 1,598 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and crossovers (2015–2021). It combines sequential multi‑point fuel injection with DOHC 16‑valve architecture to deliver responsive low‑speed drivability and efficient urban operation. Designed to meet Euro 6 emissions standards, it balances affordability with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 79.7 mm × 80.1 mm | |
Power output | 88 kW (120 PS) @ 6,000 rpm | |
Torque | 155 Nm @ 4,000 rpm | |
Fuel system | Bosch ME17.4.6 sequential MPI | |
Emissions standard | Euro 6 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven DOHC | |
Oil type | GM‑LL‑A‑025 (SAE 5W‑30) | |
Dry weight | 108 kg |
The Vauxhall B16LES was used across Vauxhall's K/Small platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Mokka and modified intake manifolds in the Astra K—and from 2018 minor ECU updates improved cold‑start emissions, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
The B16LES's primary reliability risk is timing chain tensioner wear, with elevated incidence in high‑mileage or infrequently serviced vehicles. Vauxhall internal data from 2019 indicated a measurable uptick in tensioner replacements beyond 100,000 km, while UK DVSA MOT records show secondary failures linked to catalytic converter degradation from unburned fuel. Extended oil change intervals and low‑quality oil significantly accelerate wear, making adherence to GM‑LL‑A‑025 oil specs and service schedules critical.
Analysis derived from Vauxhall technical bulletins (2015–2021) and UK DVSA failure statistics (2018–2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The B16LES offers smooth, economical performance ideal for city driving, but early units (2015–2017) are prone to timing chain tensioner wear. Later revisions improved durability. Regular oil changes with GM‑LL‑A‑025 oil and timely coil pack replacement greatly enhance longevity beyond 180,000 km.
Top issues include timing chain tensioner wear, ignition coil pack failure, throttle body carbon buildup, and exhaust manifold heat shield detachment. These are well-documented in Vauxhall service bulletins TIS‑16‑09‑02 and TIS‑16‑02‑12.
It powered the Corsa E (2015–2019), Astra K (2015–2021), and Mokka (2016–2020) in 1.6i 16V guise. Opel also used it across the same platforms in European markets. All meet Euro 6 emissions.
Minimal gains are possible. ECU remaps yield +3–5 kW at best, but the naturally aspirated design and modest displacement limit potential. Bolt‑on upgrades offer negligible improvements. Significant tuning is impractical without forced induction, which is not supported by factory architecture.
In an Astra K or Corsa E, expect ~7.4 L/100km (city) and ~5.2 L/100km (highway), or about 38 mpg UK combined. Real‑world mixed driving typically returns 35–42 mpg UK, depending on condition and driving style.
Yes. The B16LES is an interference design. If the timing chain fails or jumps, piston‑to‑valve contact can cause catastrophic damage. Chain inspection every 120,000 km is recommended despite its 'lifetime' designation.
Vauxhall specifies GM‑LL‑A‑025 compliant oil (5W‑30). Always use a quality synthetic or semi‑synthetic oil meeting this standard and change it every 15,000 km or 12 months to protect the timing system and maintain engine cleanliness.
Comprehensive technical documentation and regulatory references
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VAUXHALL Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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