The Volkswagen CTHB is a 1,498 cc, inline‑four turbocharged petrol engine produced between 2016 and 2020. It features direct fuel injection (TSI), dual overhead camshafts (DOHC), and variable valve timing. In standard form it delivers 110 kW (150 PS) and 250 Nm of torque, with strong mid‑range response for everyday drivability.
Fitted to models such as the Golf VII (Mk7), Passat B8, and Tiguan II, including the 1.5 TSI variants, the CTHB was engineered for responsive perf…
All production years 2016–2020 meet Euro 6b emissions standards .
The Volkswagen CTHB is a 1,498 cc inline‑four turbocharged petrol engineered for compact and mid‑size models (2016–2020). It combines direct fuel injection (TSI) with variable valve timing to deliver responsive low‑to‑mid range torque and efficient highway cruising. Designed to meet Euro 6b standards, it balances performance with urban emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,498 cc | |
Fuel type | Petrol (RON 95 min) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.5 mm × 85.9 mm | |
Power output | 110 kW (150 PS) @ 5,000 rpm | |
Torque | 250 Nm @ 1,500–3,500 rpm | |
Fuel system | Bosch HDP5 high-pressure direct injection (up to 350 bar) | |
Emissions standard | Euro 6b | |
Compression ratio | 12.5:1 | |
Cooling system | Water‑cooled with dual-circuit thermostat | |
Turbocharger | Single fixed‑geometry turbo (BorgWarner) | |
Timing system | Chain (front‑mounted; low wear design) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 128 kg |
The Volkswagen CTHB was used across Volkswagen's Mk7/B8 platforms with transverse mounting and shared with Škoda and SEAT under the MQB architecture. This engine received platform-specific adaptations—revised engine mounts in the Passat and intake resonance tuning in the Golf—and from 2018 the facelifted Tiguan adopted updated injector calibrations, creating minor ECU interchange limits. Partnerships allowed Škoda Octavia and SEAT Leon to use identical CTHB units. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The CTHB is generally reliable when maintained properly. Key concerns include HPFP wear and carbon buildup, but these are manageable with correct fuel (RON 95+), OEM-specified oil (VW 504 00/507 00), and timely servicing. Engines with consistent care often exceed 200,000 km without major issues.
Most frequent issues are HPFP failure, intake valve carbon deposits, PCV diaphragm rupture in the cam cover, and coolant flange leaks. All are documented in Volkswagen service bulletins, particularly STB 2042875/2, and are preventable with proper maintenance.
The CTHB appears in the Golf Mk7, Passat B8, and Tiguan II (2016–2020) as the 1.5 TSI 150 PS variant. It’s also used in Škoda Octavia III and SEAT Leon Mk3 under shared MQB platform agreements, with identical engine hardware and calibration.
Aftermarket ECU tuning is common on the CTHB platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Excellent for a turbo petrol. In a Golf 1.5 TSI, expect ~6.5 L/100km (city) and ~4.8 L/100km (highway), or ~52 mpg UK combined. Real-world mixed driving typically returns 48–55 mpg (UK), depending on conditions and driving style.
Yes. Like all modern VW petrol engines, the CTHB is an interference design. If the timing chain fails (rare but possible), piston-to-valve contact can cause catastrophic damage. Fortunately, the front-mounted chain is durable with proper oil maintenance.
Volkswagen mandates 5W-30 synthetic oil meeting VW 504 00 and 507 00 specifications. This low-SAPS oil protects the turbo, HPFP, and emissions systems. Never use older 502/505 oils or non-approved substitutes, as they may accelerate wear.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
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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.
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