The Volkswagen BZB is a 1,968 cc, inline‑four turbocharged diesel engine produced between 2005 and 2010. It features a grey cast‑iron block, aluminium alloy head, dual overhead camshafts (DOHC), and a single variable geometry turbocharger (VGT). In standard form it delivered 103 kW (140 PS) and 320 Nm, engineered for strong low-end torque and efficient long-distance cruising.
Fitted to models such as the Mk5 Golf, Jetta, Eos, and Passat B6—including the popular 2.0 TDI variants—the BZB was designed for drivers prioritizing fuel economy and relaxed motorway performance. Emissions compliance for its production run was met through a diesel particulate filter (DPF) and exhaust gas recirculation (EGR), achieving Euro 4 standards.
One documented concern is premature wear of the camshaft and tappets, particularly in engines subjected to frequent short trips or incorrect oil usage. This issue, referenced in Volkswagen's internal quality reports and service communications, can lead to excessive noise and reduced performance. Later revisions of the Pumpe Düse system incorporated material improvements to address this.
Volkswagen
Production years 2005–2010 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5680).
The Volkswagen BZB is a 1,968 cc inline‑four turbocharged diesel engineered for compact and mid‑size models (2005-2010). It combines Pumpe Düse (Unit Injector) fuel injection with a single variable‑geometry turbocharger to deliver strong low‑rpm torque and efficient highway cruising. Designed to meet Euro 4 standards, it balances everyday drivability with fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,968 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 8‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 81.0 mm × 95.5 mm | |
| Power output | 103 kW (140 PS) @ 4,000 rpm | |
| Torque | 320 Nm @ 1,800 rpm | |
| Fuel system | Bosch Pumpe Düse (Unit Injector) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 18.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Variable Geometry Turbo (VGT) - Garrett | |
| Timing system | Belt (front‑mounted) | |
| Oil type | VW 505 01 / 507 00 (SAE 5W‑40) | |
| Dry weight | 168 kg |
The VGT turbo provides strong low-RPM torque ideal for overtaking and hill climbing but requires strict adherence to 15,000 km oil change intervals using VW 505 01/507 00 specification to prevent camshaft and tappet wear. Extended idling and frequent short trips accelerate wear on the Pumpe Düse system. The timing belt must be replaced every 120,000-160,000 km along with tensioners and water pump. DPF regeneration cycles require sustained highway driving; urban-only use can lead to filter clogging and limp mode.
Oil Specs: Requires VW 505 01 / 507 00 (5W-40) specification (Volkswagen SSP 306). Critical for camshaft lubrication in Pumpe Düse engines.
Emissions: Euro 4 certification applies to all production years (VCA Type Approval #VCA/EMS/5680).
Power Ratings: Measured under DIN 70020 standards (Volkswagen Group PT-2018).
Volkswagen Service Technical Information (SSP 306, 270)
Volkswagen Electronic Parts Catalogue (ETKA)
VCA Type Approval Database (VCA/EMS/5680)
The Volkswagen BZB was used across Volkswagen's A5 platform with transverse mounting. This engine received platform-specific adaptations-reinforced mounts in the Passat and specific ECU mappings for the Eos. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, just below the fuel injectors (Volkswagen SSP 306). The 8th VIN digit for Volkswagen applications is typically 'B' for the BZB engine. Visually, it features a black plastic cam cover with "TDI" branding and a distinctive VGT turbocharger housing. Critical differentiation from the BRM engine: BZB uses a different ECU mapping and camshaft profile. The ECU part number (e.g., 03G 906 019) is also a key identifier.
The BZB's primary long-term concern is camshaft and tappet wear, inherent to its Pumpe Düse design under certain operating conditions. While not typically causing immediate failure, UK DVSA data shows it is a frequent cause of MOT advisories for excessive noise and emissions in high-mileage, poorly maintained examples. Regular oil changes with correct specification and avoiding short trips are critical preventative measures.
Analysis derived from Volkswagen technical service bulletins (2005-2010) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN BZB.
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Regulation (EC) No 715/2007
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