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Let’s be honest the moment you set sights on a used Audi RS3 engine, it is pretty apparent you are not looking for just any standard engine. Rather, you are looking for one of the most exhilarating five-cylinder powerplants to have come out of the Audi factory. Depending on whether you are planning on replacing a blown motor, refinishing a project car, or even upgrading your build, it is imperative to know what the RS3 2.5L engine offers before you hit that “buy” button.
In this text, I will explain everything that is crucial to consider when looking for an Audi RS3 motor for sale, such as generational differences, engine-specific codes, the commonly known DAZA, compatibility within platforms, engine specifications, and the most important considerations when purchasing a used or remanufactured Audi engine.
It is easy to get lost in the sea of 4-cylinder and V6 engines, but the RS3's engine stands out, and for a very good reason; it is a 2.5 liter inline 5, celebrated for its deep, growling engine note, and its torque-rich power delivery deeply routed in motorsport. The five-cylinder configuration is not forgotten in time, rather it has an enduring history that dates back to the 1980’s Audi Quattro rally cars and their legendary performance.
Although the RS3’s engines are utilized in different platforms and model years, the DAZA engine remains the most popular and discussed version in the used market.
For those who want to acquire an 2017 RS3 2.5L engine, it is most likely to be the DAZA from the 8V RS3. This is a beast of a 2.5L inline-5 TFSI (Turbocharged Fuel Stratified Injection) both on paper and on the street.
Key DAZA engine specifications:
Engine Code: DAZA
Displacement: 2.5L (2480cc)
Configuration: Inline-5
Turbocharger: Single twin-scroll turbocharger
Fuel System: Direct injection (TFSI)
Max Horsepower: 394 hp (294 kW)
Max Torque: 354 lb-ft (480 Nm)
Redline: 7000 RPM
Compression Ratio: 10.0:1
Cylinder block: Aluminum alloy (lightweight)
Transmission Compatibility: 7-speed S-Tronic dual clutch (DL501)
With this engine, you regain the beastly 5-cylinder sound, and unmatched turbo response. Another perk is the tuning possibilities.
In the internal engine coding system of Audi, the DAZA engine is part of the EA855 EVO platform. So, when you see the EA855 engine for sale, it is another way of referring to this generation of Audi 2.5L motors.
Audi RS3 (8V and 8Y)
Audi TTRS
Audi RS Q3
Even though these engines have the same general architecture and share many internal parts, DAZA is the engine code you want if you are looking for a direct swap for your RS3.
Other Engine Codes You Might Encounter -
Along with DAZA, you might hear of DNWA, which supersedes DAZA on newer RS3 8Y chassis models. Here is a summary:
For most tuning and performance builds, DAZA is the most preferred due to extensive aftermarket support and reliable performance under high boost.
For you to want a vehicle engine, you want it running optimally for a long period of time. To achieve this, look at the following when buying an Audi RS3 engine:
Confirmation of the engine code.
Request for images of the engine code showing the block. If the code is DAZA, the seller needs to prove it.
Mileage on the Unit
Staying below 60,000 miles is optimal if you want to avoid major servicing.
Turbo Condition
Turbochargers are usually reliable on these engines, but be on the lookout for oil seepage and shaft play.
Compression Test Results
Request cold and warm compression tests. All cylinders should read within 10% of the tested values across the board.
Service History
Included Components
Be clear on inclusions - turbo, manifolds, injectors, harness, ECU, etc. while some sellers have complete long blocks, others only short blocks.
The DAZA engine is plug-and-play for the 8V RS3 and fits the TTRS MK3 (2018–2021) with some tuning tweaks. For custom car builds, expect to need:
Standalone ECU or custom-tuned OEM ECU
Matching transmission or adapter plate
Custom mounts and axles (if swapping into RWD platforms)
For rotisserie rebuild or restomod projects, it’s hard to beat the value and performance of a RS3 motor for a small-displacement engine.
The DAZA engine is-
Reliably under boost, many tuners regularly run 500+ hp on stock internals.
Aftermarket ready: there are numerous expansion ports: bolt-ons, fueling upgrades, and turbo swaps.
Compact and lightweight, small cars, track builds, and engine swaps benefit.
In addition, the DAZA engine holds value. These engines are not omnipresent, and when they do surface in the market, they are in good condition and fetch a fast sale.
You may acquire RS3 motors from:
Trusted used engine vendors (they sometimes provide a warranty).
Salvage yards (acquire VIN and history).
Performance shops that are dismantling builds.
Audizine and VWVortex Online forums.
Facebook marketplace (exercise caution).
Engines that are tested are a priority, especially those with engine verification, and supporting paperwork.
Understand your chassis, a keep-the-chassis rule: it cannot be mismatched—your RS3 generation (8V or 8Y) cannot be interchanged sideways.
Dare ask the hard ones: there must be trust in the listing and engine code, compression numbers, and donor car details not missing photos.
Watch out for iron-block units: the older 2.5L units known as CEPA are not ideal models for swaps as they are uncommonly accompanied by a bulky weight.
Plan for a new budget: be ready to spend on accessories, wiring harnesses, mounts and dictating the right amount for tuning the ECU.
Summary
Acquiring a used Audi RS3 engine, be it the classic DAZA 2.5L or the later DNWA variant, represents a purchase that will undoubtedly amplify performance. Turbo Auto Parts is here to Provide you the proper engine code, documentation, and seller, you will be receiving one of the hottest powerplants ever produced by Audi. The most crucial component is understanding the purchase and the party involved in the transaction.