We have thoroughly studied the Audi 2.0 TDI DET engine and in this article we will examine its specifications, problems, failures, service life and reliability. We will also look at operating features: which oil to use, how often to change it, and what fuel consumption to expect under real-world conditions.

Audi 2.0 TDI DET Engine: Problems and Failures

The Audi 2.0 TDI with the engine code DET is a 2.0-liter turbocharged diesel engine that belongs to the Volkswagen Group's EA288 family. While generally regarded as a robust and efficient powerplant, it does have a set of known issues that owners should be aware of. Below is a list of the most common problems, typical mileage at which they appear, and indicative repair costs.

Common Issues, Mileage, and Repair Costs

  • Oil consumptionSome DET engines consume excessive oil (1L per 1000 km) due to worn piston rings or faulty PCV valve. Usually appears after 100,000-150,000 km. Repair cost: $2,500-$4,000 USD for piston rings replacement.
  • EGR valve and cooler cloggingCarbon buildup from EGR system causes poor idle and reduced power. Typical after 80,000 km. Cleaning or replacement costs $200-$500 USD.
  • Injector failuresBosch piezo injectors can fail, leading to rough running and misfires. Usually around 120,000-200,000 km. Cost: $300-$600 USD per injector (parts + labor).
  • Turbocharger actuator / variable geometry stickingCauses overboost or underboost, limp mode. Appears around 150,000 km. Replacement actuator: $400-$700 USD; turbo overhaul: $1,500-$2,500 USD.
  • Timing chain stretchAlthough EA288 engines use a gear-driven system for some parts, the balance shaft module chain can stretch, making noise (rattling on cold start). This can happen after 200,000 km. Replacement of balance shaft module: $1,200-$2,000 USD.
  • DPF (Diesel Particulate Filter) cloggingIf the car is mostly driven short distances, the DPF may clog. Usually around 100,000-180,000 km. Replacement cost: $1,500-$3,000 USD (aftermarket $800-$1,500 USD).
  • AdBlue system issues (if applicable)The SCR system can fail, causing warning lights and reduced power. Problems may occur after 150,000 km. Repairs vary: $500-$1,500 USD.

Prevention: The best way to avoid many of these failures is to adhere to the manufacturer's service intervals, use high-quality oil that meets the VW 507.00 specification, and allow the engine to warm up and cool down properly. Also, occasional high-speed driving helps to regenerate the DPF and clean the EGR. Moreover, using a good fuel additive can help clean injectors and prevent carbon buildup.

Reliability and Service Life

The Audi 2.0 TDI DET, part of the EA288 family, is often considered one of the more reliable diesels from the Volkswagen Group, especially when compared to earlier PD engines. The manufacturer does not officially state a service life, but in real-world use, these engines are known to cover 300,000 km (around 186,000 miles) or more with proper maintenance. Many taxi and fleet cars equipped with this engine are known to reach 400,000 km without a major overhaul, though this usually involves diligent servicing and regular oil changes every 10,000-15,000 km. Neglected examples, however, may suffer from oil sludge, turbocharger failure, and chain problems by 200,000 km. In summary, reliability is strongly correlated with maintenance.

Specifications

Technical Specifications
  • Engine code: DET
  • Displacement: 2.0 L (1968 cc)
  • Configuration: Inline-4
  • Bore x stroke: 81.0 x 95.5 mm
  • Compression ratio: 16.0:1
  • Aspiration: Single turbocharger (variable geometry)
  • Power (typical depending on application): 110 kW (150 PS) @ 3500 rpm
  • Torque: 340 Nm (251 lb-ft) @ 1750-3000 rpm
  • Fuel injection system: Common rail (Bosch) with piezoelectric injectors
  • Fuel type: Diesel (EN 590)
  • Emission standard: Euro 5 / Euro 6 (depending on market)
  • Timing drive: Chain-driven (with gear-driven auxiliary modules)
  • Engine management: Bosch EDC17 or Continental SIMOS (varies)
Maintenance Specifications
  • Oil specification: VW 507.00 (5W-30) for long-life service or VW 505.01 (5W-40) for fixed intervals
  • Oil capacity (with filter): Approximately 4.6 L
  • Oil change interval (factory): Long-life up to 30,000 km / 2 years; recommended: 10,000-15,000 km for longevity
  • Oil filter change interval: With every oil change
  • Air filter replacement: Every 60,000 km
  • Fuel filter replacement: Every 60,000 km (or 90,000 km in some markets)
  • Cabin filter replacement: Every 15,000-30,000 km
  • Timing chain: No official replacement interval; inspect for rattling noise, typically lasts 250,000+ km if oil is changed regularly
  • Real-world fuel consumption: 6-7 L/100 km combined; 5-6 L/100 km highway; 7-8 L/100 km city

Which Car Models Used This Engine

Applications

  • Audi A4 (B9) 2.0 TDI ultra – 2015-2020 (depending on market)
  • Audi A6 (C8) 2.0 TDI – 2018-2024 (some markets use DET code variant)
  • Audi Q2 2.0 TDI – 2016-2020
  • Audi Q5 (FY) 2.0 TDI – 2016-2023
  • Audi A3 (8V) 2.0 TDI – 2013-2020 (some versions)
  • SEAT, Skoda, and Volkswagen models using the EA288 2.0 TDI 150PS variant, though engine code may differ (e.g., CRLB, CRTC, etc.)

Note: The DET code is specifically used in certain Quattro and front-wheel-drive Audi models. In other VW Group vehicles, the same basic engine often appears as DFGA, CRLB, or DNBC. Check your VIN for exact code.

Owner Reviews

What Owners Say

  • John, Manchester, UK (Audi A4 2.0 TDI ultra, 2017, 120,000 km)"I do mostly highway driving. The engine is smooth and quiet, returns about 5.5 L/100 km. After 100,000 km, the EGR valve needed cleaning. Cost me £250. Other than that, no issues. Regular oil changes every 10,000 km are key."
  • Marek, Warsaw, Poland (Audi Q5 2.0 TDI, 2016, 210,000 km)"Great engine with good torque, towing a caravan is easy. However, at 180,000 km the AdBlue pump failed, costing about €800. Also had to replace the wheel bearing, but that's not engine-related. If you buy a used one, check the service history!"
  • Sophie, Lyon, France (Audi A3 2.0 TDI, 2015, 90,000 km)"I love the fuel economy – around 6 L/100 km in town. The car is quick and refined. But at 80,000 km, the engine started rattling on cold starts. The dealer said it's the timing chain and it's covered under extended warranty. If not, it could have been expensive. So make sure to listen for rattles."
  • Dave, Toronto, Canada (Audi A6 2.0 TDI, 2018, 150,000 km)"This engine is a workhorse. I have had only one issue – the DPF sensor failed, replaced under warranty. The engine burns no oil between changes. I change oil with 5W-30 VW 507.00 every 12,000 km. It's a great road trip car."

Verdict / Final Thoughts

The Audi 2.0 TDI DET is a solid and efficient engine that, when maintained properly, can provide many miles of reliable service. It offers a good balance of performance and economy, making it suitable for daily commuting, long-distance travel, and even light towing. The main risks are neglecting oil changes, which can lead to timing chain and oil consumption issues, and the eventual DPF/EGR problems that come with all modern diesels used in city driving. If you're considering a used car with this engine, ask for a full service history, check for signs of oil consumption, and listen for any unusual engine noises on cold start. With proper care, it's a dependable choice.