The Volkswagen CXSB is a 1,984 cc, inline‑four turbocharged petrol engine produced between 2019 and 2023. It features direct fuel injection (TSI), dual overhead camshafts (DOHC), and variable valve timing, delivering 180 kW (245 PS) and 370 Nm of torque. Its turbocharged direct injection system enables strong low‑end response with improved fuel economy compared to naturally aspirated alternatives.
Fitted to performance variants such as the Golf Mk8 R, Audi S3 (8Y), and Cupra Leon, the CXSB was engineered for high-performance dynamics with everyday usability. Emissions compliance was achieved through precise injection control, a gasoline particulate filter (GPF), and secondary air injection, meeting Euro 6d-TEMP and Euro 6d standards depending on production year.
One documented concern is premature wear of the high-pressure fuel pump (HPFP) cam follower, highlighted in Volkswagen Service Technical Bulletin 2020‑05. This issue stems from marginal lubrication under high-load, low-RPM conditions, leading to HPFP seizure. From mid‑2021, revised cam follower materials and updated engine oil specifications were introduced to mitigate wear.
Production years 2019–2020 meet Euro 6d-TEMP standards; 2021–2023 models comply with Euro 6d (VCA UK Type Approval #VCA/EMS/9521).
The Volkswagen CXSB is a 1,984 cc inline‑four turbocharged petrol engine engineered for hot hatches and compact performance sedans (2019–2023). It combines gasoline direct injection with a single turbocharger and a gasoline particulate filter to deliver responsive power and strong low‑rpm torque. Designed to meet Euro 6d-TEMP and Euro 6d emissions standards, it balances sporty performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol (RON 95 min, RON 98 recommended) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 82.5 mm × 92.8 mm | |
| Power output | 180 kW (245 PS) @ 5,000–6,500 rpm | |
| Torque | 370 Nm @ 1,600–4,300 rpm | |
| Fuel system | Bosch HDEV6 direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d-TEMP (2019–2020); Euro 6d (2021–2023) | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled with dual‑circuit layout | |
| Turbocharger | Single IHI VF50 turbo (variable geometry) | |
| Timing system | Chain‑driven DOHC | |
| Oil type | VW 504 00 / 507 00 (SAE 0W‑20 or 5W‑30) | |
| Dry weight | 148 kg |
The CXSB’s turbocharged direct injection delivers brisk acceleration but demands high-quality fuel (RON 98 recommended) to prevent knock and carbon buildup on intake valves. Oil changes every 10,000–15,000 km with VW 504/507‑approved 0W‑20 or 5W‑30 oil are essential to protect the HPFP cam follower and timing chain. The addition of a gasoline particulate filter (GPF) requires regular highway driving to enable passive regeneration. Revised cam follower materials from mid‑2021 reduce HPFP wear per Volkswagen SIB 2020‑05; pre‑2021 units should be monitored for hard starts or fuel pressure faults.
Oil Specs: Requires VW 504 00 or 507 00 specification (Volkswagen SIB 2020‑05). ACEA C5 oils may be used if VW-approved.
Emissions: Euro 6d-TEMP applies to 2019–2020 models; Euro 6d compliance for 2021–2023 confirmed under VCA Type Approval #VCA/EMS/9521.
Power Ratings: Measured under DIN 70020 standards. Full 245 PS output requires RON 98 fuel (Volkswagen TIS Doc. TSI‑2019‑CXSB).
Volkswagen Technical Information System (TIS): Docs TSI‑2019‑CXSB, SIB 2020‑05
VCA Type Approval Database (VCA/EMS/9521)
DIN 70020 Engine Power Certification Standard
The Volkswagen CXSB was used across Volkswagen's Mk8 platform with transverse mounting and shared with Audi and Cupra for longitudinal and transverse applications. This engine received platform-specific adaptations—reinforced engine mounts in the Golf R and revised cooling in the Audi S3—and from 2022 the Cupra Leon facelift adopted the DNUE variant with updated ECU maps, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the oil filter housing (Volkswagen TIS TSI‑2019‑CXSB). The 4th and 5th VIN digits indicate engine family ('CX' for CXSB series). CXSB units feature black valve covers and an IHI VF50 turbo with external wastegate actuator. Critical differentiation from DNUE: CXSB uses Bosch MED17.5.7 ECU with round OBD port and no GPF bypass; DNUE includes updated GPF regeneration logic. HPFP cam follower part number 06K 127 025 M (pre-2021) vs. 06K 127 025 P (post-2021) indicates service bulletin compliance (Volkswagen SIB 2020‑05).
The CXSB's primary reliability risk is high-pressure fuel pump (HPFP) cam follower wear on early builds, with elevated incidence in high-load, low-RPM driving (e.g., towing, mountain roads). Volkswagen internal data from 2021 indicated a notable rate of HPFP replacements before 80,000 km in pre-mid‑2021 units, while UK DVSA records show increased fuel system-related MOT advisories in modified examples. Extended oil change intervals and use of incorrect oil viscosity increase wear risk, making oil specification and service adherence critical.
Analysis derived from Volkswagen technical bulletins (2019–2022) and UK DVSA failure statistics (2020–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN CXSB.
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