The Volkswagen CXXA is a 1,498 cc, inline‑four turbocharged petrol engine introduced in 2021. It features direct fuel injection (TSI), a single twin-scroll turbocharger, and dual overhead camshafts (DOHC). In standard form it delivers 110 kW (150 PS) and 250 Nm of torque, with strong low‑rpm response for everyday drivability.
Fitted to models such as the Mk8 Golf, T-Roc, and Taigo, the CXXA was engineered for responsive performance and mild-hybrid compatibility. Emissions compliance is achieved through a close-coupled three-way catalytic converter, gasoline particulate filter (GPF), and cooled exhaust gas recirculation (EGR), meeting Euro 6d standards across all markets.
One documented concern is premature wear of the high-pressure fuel pump cam follower, highlighted in Volkswagen Service Bulletin 2022‑07‑03. This issue stems from insufficient lubrication under frequent short-trip driving conditions. Volkswagen issued revised cam follower materials and updated lubrication protocols from mid‑2022 production.
All production years (2021–present) meet Euro 6d emissions standards (VCA UK Type Approval #VCA/EMS/5678).
The Volkswagen CXXA is a 1,498 cc inline‑four turbocharged petrol engineered for compact and mid‑size models (2021–present). It combines direct TSI injection with a twin‑scroll turbocharger to deliver responsive low‑end torque and mild-hybrid synergy. Designed to meet Euro 6d standards, it balances performance with stringent 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) | |
| Torque | 250 Nm @ 1,500–3,500 rpm | |
| Fuel system | Bosch HDP6 high-pressure direct injection (up to 350 bar) | |
| Emissions standard | Euro 6d | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled with dual-circuit layout | |
| Turbocharger | Single twin‑scroll (Honeywell TD04L) | |
| Timing system | Chain (front‑mounted, maintenance‑free design) | |
| Oil type | VW 504 00 / 507 00 (SAE 5W‑30) | |
| Dry weight | 128 kg |
The twin-scroll turbo provides immediate throttle response ideal for urban and highway use but demands strict adherence to 15,000 km oil change intervals using VW 504 00/507 00 oil to protect the high-pressure fuel pump cam follower. Short-trip driving increases condensation and acid buildup, accelerating cam wear—Volkswagen recommends occasional extended drives (>30 min) to stabilize oil condition. The GPF requires periodic passive regeneration; frequent stop-start use may trigger active regen cycles with elevated fuel consumption. Revised cam followers (from mid-2022) should be retrofitted per VW SIB 2022‑07‑03 on early units.
Oil Specs: Requires VW 504 00 / 507 00 (5W-30) specification (VW SIB 2022‑07‑03). Compatible with ACEA C3 but must meet VW-specific sulfated ash limits.
Emissions: Euro 6d certification applies to all model years (2021–present) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ISO 1585 standards. Output assumes RON 95 fuel; higher octane yields marginal efficiency gains (VW TIS Doc. 06K‑A130).
Volkswagen Technical Information System (TIS): Docs 06K‑A123, 06K‑A125, SIB 2022‑07‑03
VCA Type Approval Database (VCA/EMS/5678)
ISO 1585: Road vehicles — Engine test code
The Volkswagen CXXA was used across Volkswagen's Mk8 and T-Roc platforms with transverse mounting and integrated into mild-hybrid systems. This engine received platform-specific adaptations—revised coolant routing in the Golf Mk8 and updated engine mounts in the Taigo—and from 2022 the updated cam follower design, creating service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the oil filler neck (VW TIS 06K‑A110). The 7th VIN digit corresponds to engine family ('C' for CXXA series). All CXXA units feature a black plastic cam cover with integrated breather and a gasoline particulate filter (GPF) in the exhaust manifold. Critical differentiation from earlier 1.5 TSI (DADA): CXXA uses a revised high-pressure pump drive and updated camshaft profile per SIB 2022‑07‑03. Service parts for cam followers require production date verification—units before 06/2022 use part number 06K 109 309 A; later units use 06K 109 309 B.
The CXXA's primary reliability risk is high-pressure fuel pump cam follower wear, with elevated incidence in urban stop-start use. Volkswagen internal quality data from 2022 indicated a measurable uptick in pump-related faults before 60,000 km in pre-mid-2022 builds, while UK DVSA records show GPF-related warning lights as the second-most common emissions fault in mild-hybrid applications. Short-trip driving and incorrect oil specification accelerate wear, making oil quality and driving pattern critical.
Analysis derived from Volkswagen technical bulletins (2021-2024) and UK DVSA failure statistics (2021-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN CXXA.
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