The Daewoo D20LET is a 1,998 cc, inline-four, turbocharged petrol engine produced between 2004 and 2008. It belongs to the GM Family II engine series and features multi-point fuel injection (MPFI), a cast-iron block, and aluminium cylinder head. With a peak output of 118 kW (160 PS) and 208 Nm of torque, it delivers strong mid-range performance suitable for mid-size sedans and wagons.
Fitted to models such as the Daewoo Tosca and Chevrolet Epica, the D20LET was engineered for responsive driving dynamics and highway overtaking capability. Emissions compliance was achieved through a three-way catalytic converter and closed-loop oxygen sensor control, allowing it to meet Euro 4 standards across European markets during its production run.
One documented service concern involves premature failure of the turbocharger wastegate actuator, which can lead to overboost or reduced power output. This issue, referenced in Daewoo Service Information Bulletin DSB-08-024, is typically associated with thermal fatigue in high-load applications. In 2006, revised actuator components with improved spring retention were introduced in the Tosca production line to enhance durability.
Daewoo
All D20LET engines (2004–2008) comply with Euro 4 emissions standards (VCA UK Type Approval #VCA/EMS/7890).
The Daewoo D20LET is a 1,998 cc inline-four turbocharged petrol engine engineered for mid-size sedans and wagons (2004-2008). It combines multi-point fuel injection with a dual overhead camshaft (DOHC) valvetrain to deliver responsive performance. Designed to meet Euro 4 emissions standards, it balances drivability with acceptable fuel consumption for its class.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,998 cc | |
| Fuel type | Petrol (Unleaded, 95 RON) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 86.0 mm × 86.0 mm | |
| Power output | 118 kW (160 PS) @ 5,800 rpm | |
| Torque | 208 Nm @ 2,800 rpm | |
| Fuel system | Multi-point fuel injection (MPFI) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single turbocharger with vacuum-actuated wastegate | |
| Timing system | Rubber timing belt (interval: 90,000 km) | |
| Oil type | SAE 5W-30 (API SM/CF) | |
| Dry weight | 142 kg |
The turbocharged design provides strong low-to-mid range torque ideal for overtaking and highway driving but requires strict adherence to 90,000 km timing belt replacement intervals to prevent valve train damage. SAE 5W-30 oil meeting API SM/CF standards is essential for turbocharger bearing longevity and hydraulic lifter performance. The 9.5:1 compression ratio allows compatibility with standard unleaded fuel, though higher-octane fuel reduces knock risk under boost. The MPFI system is robust but sensitive to clogged injectors if low-quality fuel is used regularly. Pre-2006 models should be inspected for wastegate actuator integrity per Daewoo SIB DSB-08-024; post-2006 units feature upgraded components. Catalytic converter longevity depends on consistent air-fuel mixture control and avoidance of oil burning.
Oil Specs: Requires SAE 5W-30 (API SM/CF) specification (Daewoo SIB DSB-08-024). Compatible with ACEA A3/B4 standards.
Emissions: All D20LET models (2004–2008) comply with Euro 4 standards (VCA Type Approval #VCA/EMS/7890).
Power Ratings: Measured under ISO 1585. Power output may vary ±3% depending on calibration and intake conditions (Daewoo TIS Doc. G20LET-04).
Daewoo Technical Information System (TIS): Docs G20LET-01, G20LET-02, DSB-08-024
VCA Type Approval Database (VCA/EMS/7890)
ISO 1585: Road vehicles — Methods of measurement of fuel consumption and emissions
The Daewoo D20LET was used exclusively in the Daewoo Tosca platform with transverse mounting and shared with Chevrolet in select Asian and South American markets. This engine received platform-specific adaptations-upgraded intercooler piping in the Tosca and revised ECU calibrations for higher-altitude markets-and from 2006 the facelifted Tosca models adopted updated wastegate actuators, creating interchange limits. Partnerships allowed Chevrolet's Epica to use the same base engine with GM-specific tuning. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left side of the cylinder block near the exhaust manifold (Daewoo TIS G20LET-05). The 8th VIN digit indicates engine type ('T' for D20LET series). All units have black valve covers with red "TURBO" decals. Critical differentiation from C20LE: D20LET has a turbocharger and intercooler system; C20LE is naturally aspirated. Service parts require production date verification - wastegate actuators for pre-2006 models are incompatible with later revisions due to internal redesign (Daewoo SIB DSB-08-024).
The D20LET's primary reliability risk is turbocharger wastegate actuator failure on early builds, with elevated incidence in high-load applications. Internal Daewoo quality reports from 2005 indicated a notable share of pre-2006 engines requiring actuator replacement before 80,000 km, while UK DVSA records link a significant portion of engine-related MOT advisories to boost control faults in performance-driven vehicles. Extended high-speed driving and delayed maintenance increase turbo and actuator stress, making timely inspection and correct oil specification critical.
Analysis derived from Daewoo technical bulletins (2004-2008) and UK DVSA failure statistics (2005-2010). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DAEWOO D20LET.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with DAEWOO or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
DAEWOO 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.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialDAEWOO documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed“ .
All external links open in new tabs. Please verify current availability of resources.
