Citroën THP Turbo Engine: Everything You Need to Know Before Buying

Artigo voltado ao mercado Brasileiro. Artigo atualizado em 1 de July de 2026 por João Daniel

When the engine starts to roar… it’s time to understand what’s under the hood.

There are many cases of people who bought a car thinking they were getting a great deal, but then were left disappointed. This happens frequently when we talk about… Citroën’s THP turbo engineOne of the most powerful and controversial cars on the market. From afar, it looks like a gem: plenty of performance, strong acceleration, and a sporty feel that excites anyone. But is it all just joy?

Right from the start, it’s important to clarify something: this type of engine requires care that many people ignore. And that’s where the problem lies. The goal of this article is to be upfront and show, in a simple and direct way, Everything you need to know before buying a Citroën car with a THP engine.. And of course, without beating around the bush or using technical jargon that nobody understands.

What is the Citroën THP Turbo engine and why does it attract so much attention?

THE THP turbo engine (Turbo High Pressure) was developed in partnership between PSA (Peugeot-Citroën) and BMW. Yes, you read that right: BMW had a hand in it. It was designed to offer high performance with moderate fuel consumption, something many people want in a modern car.

At the beginning of the second paragraphConsider this a warning: Citroën’s THP engine may be amazing, but it requires extra attention to preventative maintenance.. If the owner is negligent, problems will arise.

Is it worth buying a used Citroën with a THP engine?

“Does the THP engine have a lot of problems?” / “Is the Citroën THP reliable?”

This is one of the most frequently Googled questions. The answer? It depends on the car’s history. The main criticism of the THP engine isn’t in the design, but rather in… Neglect of maintenance.

Those who care, reap. Those who ignore, suffer.

Main features of the THP engine:

• High-pressure turbocharger with direct injection
• High power (150 to 173 hp, depending on the version)
• Low-end torque (excellent for overtaking)
• Powerful acceleration, even in heavier cars.

Quick overview table of the THP engine

Common problems with the THP engine and how to avoid them.

“Chronic THP engine problems”

Before giving up on your car, understand this: a large part of the problems happen because lack of basic care. The most common ones are:

1. Carbon buildup in the cylinder head
2. Using the wrong oil or oil that does not meet specifications.
3. Spark plugs and coils that are past their replacement interval.
4. Worn accessory belt
5. Overheating due to a cooling system failure.

To avoid these problems, check out some links to parts that help keep your engine healthy:

• Buy oil and filters at a discount on Amazon.
• Find great deals on items at Shopee.
• Original accessories and parts on Mercado Libre

Comparative table of Citroën models with THP engine.

Basic care to keep your THP engine healthy.

• Change the oil every 5,000 km (not every 10,000, as many do)
• Use oil with the specified specifications. PSA B71 2290
• Check and replace the candles every 20,000 km
• Never let the engine overheat: pay attention to the temperature.
• When turning off the car after a long drive, wait 30 seconds for the turbo to cool down.

See preventive maintenance kits on Amazon here.

Access THP engine parts on Shopee.

Buy original parts on Mercado Libre with a discount.

Is it worth it, or is it better to avoid the THP engine altogether?

The truth is simple: It’s definitely worth it, if the car is well maintained.. Now, if the previous owner treated the car terribly, you could be in trouble. So, when buying, don’t just go by price. Take it to a trusted mechanic, ask for the maintenance history, and listen to the sound of the engine running.

Key points to remember

• The THP engine is powerful and economical, but requires preventative maintenance.
• The biggest problems stem from negligence.
• Using the right oil is the golden rule.
• Buying quality parts is essential to avoid failures.

FAQ – Frequently Asked Questions about the Citroën THP engine

1. Does the THP engine have many problems?
If it’s poorly maintained, yes. If it’s properly maintained, it’s very reliable.

2. What oil should I use in a THP engine?
Always use PSA B71 2290, usually 5W30. Never use generic oil.

3. Can I use regular gasoline?
Yes, but ideally you should use premium gasoline or ethanol for better performance.

4. What is the lifespan of the THP engine?
With proper maintenance, it can easily exceed 200,000 km.

5. Why do some people speak negatively about the THP engine?
Because many previous owners didn’t perform proper maintenance and sold the cars with problems.

Bullet Points – Quick summary for those in a hurry

• The THP engine delivers high performance and torque at low RPMs.
• Created in partnership with BMW, it is modern and reliable.
• Requires rigorous preventative maintenance: oil, spark plugs, belt, and cooling system.
• Ideal for those seeking performance with economy.
• Buying used can be a good option, if it has a reliable history.
• Available in various Citroën models and also in the Peugeot range.
• Links with discounts for parts: Amazon, Shopee, Mercado Libre