Citroën DS5
Stronger BlueHDi variant of the 1.6-litre diesel with 120 hp. Punchy and economical, ideal for compact and mid-range vehicles. Often paired with the EAT6 automatic.
Underpowered DS5
120 hp in the heavy DS5 — economical but lacking drive for the heavy vehicle.
Engine Weaknesses 6
Identical issue to the BlueHDi 100: the integrated level sensor in the urea tank fails and cannot be replaced individually. Without goodwill or warranty, tank replacement costs up to €1,200. Cold winters accelerate crystallisation problems.
Symptoms: Warning message 'Check AdBlue', countdown on instrument cluster, start lockout after several cycles
The electric turbo actuator on the BlueHDi 120 can fail and lock the turbocharger in one position. This results in permanent boost loss or excessive boost pressure. Repair often requires replacing the complete turbocharger.
Symptoms: Limp mode, weak acceleration, boost pressure faults P0234/P0299, turbo whistling noise
On the BlueHDi-120, soot builds up intensively in the EGR valve and cooler. Technical reports list EGR damage among the five most common workshop jobs on this engine, alongside injector, FAP and turbo problems. Cleaning every 60,000 km prevents consequential damage.
Symptoms: Engine warning light, limp mode, increased consumption, hesitation at part load
Despite the SCR system, the BlueHDi-120 DPF can clog prematurely in pure urban use. When forced post-injection for filter regeneration happens with a cold engine, fuel enters the oil and additionally damages bearings and turbo.
Symptoms: DPF warning light, heavy smoke, rising oil level, declining engine power
The pump integrated into the AdBlue tank corrodes from moisture on the PCB. Fault code P20EE (SCR efficiency) or P20E8 (underpressure). Complete tank replacement required as the pump is not available separately.
Symptoms: Warning 'exhaust aftertreatment fault', countdown message 'XXX km until engine lockout', fault codes P20E8/P20EE/P20F6. Engine will not start once the zero reading is reached.
The NOx sensor permanently outputs the substitute value of 20 ppm instead of real readings. The ECU detects this and warns of emissions limit exceedance. Replacement must be calibrated with Diagbox.
Symptoms: Engine warning light, exhaust aftertreatment fault message, rough idle under lean operation, immediate re-failure after replacement if not calibrated.
Vehicle Weaknesses 4
Control arm bushes and ball joints on the DS5 I front axle need replacing at least once during the vehicle's life on many cars. Noises over crosswise expansion joints and uneven tyre wear are typical signs.
The MyWay infotainment system in the DS5 I is prone to freezing, spontaneous reboots and screen blackouts while driving. The navigation system stops working reliably after a system crash. Software updates only partially help.
The climate control ECU in the DS5 I develops faults over time. Temperature sensors and blower motors fail, causing the climate system to regulate incorrectly. The A/C compressor shows declining output from 100,000 km.
The DS5 I shows rust at sills and wheel arch edges, especially on early build years without regular cavity sealing. Stone chip damage on the bonnet accelerates corrosion.
