Engine failure, a turbo that's sent debris through the system, a snapped timing belt? When an engine is beyond repair, the main dealer price for a new unit is often eye-watering — and a second-hand engine from a breaker's yard is a lottery. An exchange engine is the third option: a fully reconditioned engine, workshop-rebuilt, tested, and warranted for up to 24 months, at a fraction of the cost of new. Here's how it works, what "bare engine" actually means in practice, and what you need to plan for.
What is an exchange engine?
The principle is straightforward: your failed engine is replaced by an identical unit that has been fully reconditioned — completely stripped down, every component inspected, all wear parts systematically replaced, and reassembled to manufacturer tolerances. In return, your old engine (the "deposit unit") is sent back to us to be reconditioned in turn. The deposit charged at the time of order is refunded in full upon receipt of your old unit. The process is exactly the same as for an exchange gearbox — it has been the core of our business since 2014.
Bare engine: what it means (and why it's an advantage)
At EDEN BOITES, engines are supplied bare: the fully reconditioned block, without ancillary components. The turbo, injection system, alternator, starter motor, manifolds and sensors are all transferred from your old engine by your mechanic during fitting. This is standard industry practice, and it has two clear benefits: you don't pay for ancillary parts that your own — often perfectly serviceable — components make unnecessary; and electronic compatibility with your vehicle is assured, since your own parts are reused. One important point: if the original failure was caused by an ancillary component (a turbo that contaminated the system with debris, for example), that component must be replaced or thoroughly inspected during fitting — your mechanic will assess this.
How does an exchange engine work?
- Identification. Every vehicle has a specific engine code (K9K, DV6, TDCi, PureTech...). Send us your registration number or VIN and our experts will identify the exact reference.
- Order and delivery. The reconditioned engine is dispatched to your mechanic or your home address, anywhere in France and across the European Union — lead time confirmed on your quote.
- Fitting and transfer of ancillary components by the garage of your choice.
- Return of the deposit unit. Your old engine is sent back using the label provided, and your deposit is refunded upon receipt.
How much does an exchange engine cost?
Prices observed in September 2026 across our 1 963 references in stock range from €2 270 (small diesel city cars such as the Nissan Micra 1.5 dCi) to €12 959 (large premium units such as the Audi Q5 3.0 TDI). The most common engine types — 1.5 dCi, 1.6 HDi, 1.2 PureTech, 2.0 TDI, 2.2 TDCi — fall predominantly in the lower to mid range of these prices. The exact price for each reference is displayed in real time on its product page, within our reconditioned engine collection. You should also budget for: fitting costs (which vary by vehicle) and consumables required during installation (oil, coolant, filters, and sometimes a timing kit — well worth doing while the engine is out).
Running in: the one rule to follow
A reconditioned engine needs to be run in just like a new one: during the first 1,000 to 1,500 km, avoid sustained high revs and heavy loads, vary your driving style, and then have a check oil change carried out if your mechanic recommends it. This is what determines the long-term durability of the newly restored bearing surfaces.
What warranty comes with an exchange engine?
Every engine is covered by a warranty of up to 24 months, with a satisfaction or money-back guarantee on the exchange, in accordance with our Terms and Conditions. Payment can be spread over up to 10 instalments, and fitting by a professional is a condition of the warranty.
FAQ — Exchange Engines
Does the engine come with the turbo and injection system?
No: the engine is supplied bare, and your original ancillary components are transferred during fitting. This is what ensures compatibility and keeps the price in check.
Is a reconditioned engine as good as a new one?
The block is restored to manufacturer tolerances with new wear parts, then inspected before dispatch. For comparable reliability, the saving is typically in the region of 40 to 60% compared with a new unit.
What happens to my old engine?
It is taken back (deposit refunded upon receipt) and reconditioned in turn — the virtuous cycle of the circular economy.
How can I be sure of compatibility?
The engine code is the deciding factor. Send us your registration number or VIN and our experts will identify the exact reference — at no cost and with no obligation.
How long will it take to receive the engine?
Lead time depends on the reference and will be confirmed in your quote, before any order is placed.
Find your exchange engine
Browse our reconditioned exchange engines or request an online quote: our advisers will identify your reference within minutes.
