EXPERT IN AUTO PARTS
16 September 2025 (updated) Table of Contents
The most frequent complaints about the Renault Kadjar concern the CVT automatic transmission, which shows weaknesses particularly in conjunction with the 1.2 TCE 130 and 1.6 DCI engines. The continuously variable transmission typically develops its first symptoms from 80,000 km, such as jerky movements when starting off, delayed reactions when accelerating and unusual noises while driving. The reliability of the system is affected by frequent breakdowns and expensive repairs, with the service life of the transmission often falling short of expectations. Particularly problematic is the behavior at low speeds, where the transmission does not shift properly and does not shift smoothly between ratios.
Regular maintenance is crucial for the longevity of the transmission system. The sensitive Renault Kadjar CVT transmissions require special attention at oil change intervals, which should be carried out every 60,000 km. A professional diagnosis using a readout device can detect faults in the control unit at an early stage, while a preventive flushing of the transmission oil can prevent major damage.
The TCE engine family of the Renault Kadjar, in particular the 1.2 TCE 130 and 1.3 TCE 140, shows considerable weaknesses in the timing chain. The problem manifests itself from a mileage of 60,000 km with characteristic rattling noises during cold starts, which indicate an elongated or worn timing chain. The 2019 models are particularly affected, with the faults often being exacerbated by inadequate maintenance intervals. The engine will no longer start reliably if the timing chain is too worn and will not function properly at higher engine speeds. Common faults also include damaged chain tensioners and guide rails, which make it necessary to completely replace the timing drive.
A systematic check is essential for the timely detection of timing chain problems. The precise Renault Kadjar TCE timing chains require regular checks every 30,000 km and the use of high-quality engine oil with the correct viscosity. A professional inspection can assess the condition of the chain by endoscopy or noise measurement and give early warning of costly engine damage.
The air conditioning system of the Renault Kadjar regularly develops malfunctions, which manifest themselves particularly between 40,000 and 80,000 km mileage. The system does not cool sufficiently or does not function fully, with the most common causes being defective compressors, blocked expansion valves or leaks in the refrigerant lines. Symptoms include warm air despite the cooling system being switched on, unusual noises from the dashboard and misted windows even when the air conditioning is activated. The 1.5 DCI and 1.6 DCI variants in particular exhibit these weak points, with the risk of electrical faults due to defective sensors also impairing functionality. The reliability of the entire air conditioning system is significantly reduced by these recurring breakdowns.
Article number: MN7511-10
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£ 39,90
£ 3,99 for 1 litre
price incl. 20% VAT, excl. delivery costs
SKF Bellow Set, drive shaft
146 mm, Wheel Side, Front Axle, with clamps
Article number: VKJP 01001
£ 8,84
price incl. 20% VAT, excl. delivery costs
VALEO Antifreeze
G12, yellow, 1l, Concentrate, Amine free-Phosphate free
Article number: 820734
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£ 7,49
£ 7,49 for 1 litre
price incl. 20% VAT, excl. delivery costs
Article number: EK720
£ 125,70
price incl. 20% VAT, free delivery
BOSCH Oil filter
M 20 x 1,5, Spin-on Filter
Article number: F 026 407 176
£ 9,35
price incl. 20% VAT, excl. delivery costs
Professional maintenance is required to keep the air conditioning system in optimum condition. The complex Renault Kadjar air conditioning systems require annual checks of the refrigerant level and tightness as well as regular disinfection of the evaporator. Preventive maintenance every 2 years with refrigerant renewal and system cleaning can prevent major breakdowns and extend the life of the components.
The Renault Kadjar's electric exterior mirrors exhibit frequent malfunctions, with the mirror not folding in or out properly. These problems typically occur after 30,000 to 50,000 km and affect both the mechanical components and the electrical controls. Symptoms include mirrors jammed in one position, incomplete folding movements or complete failure of the electrical adjustment. The most common causes are worn gears in the folding motor, corroded contacts or defective control units. The problem is exacerbated by weather conditions and temperature fluctuations, especially in vehicles that are frequently parked outdoors. The risk of electrical faults also increases due to moisture penetrating the mirror housings.
A professional inspection is necessary to diagnose the mirror problems. The sensitive Renault Kadjar mirror motors require regular lubrication of the moving parts and inspection of the electrical connections every 20,000 km. Preventive treatment with water-repellent agents and regular cleaning of the contacts can significantly extend the life of the mirror mechanism.
The braking system of the Renault Kadjar shows various weak points, which become particularly noticeable at higher mileages of 60,000 km or more. The most common complaints include premature wear of the brake pads, especially on the rear axle, and problems with the brake callipers not working properly. The system does not switch correctly between different braking modes, resulting in uneven braking behavior. In addition, faults occur in the ABS system, manifested by warning lights on the dashboard and reduced braking performance. Reliability is further compromised by corroding brake lines and faulty brake boosters, with component life often below manufacturer specifications.
Regular maintenance is crucial to the safety of the braking system. The critical Renault Kadjar brake components require a thorough inspection of pad thickness and disk condition every 15,000 km, as well as annual brake fluid checks. Professional maintenance with regular brake fluid changes every 2 years and bleeding of the system can prevent dangerous failures and ensure optimum braking performance.
Valvoline Engine oil
5W-30, 4l
Article number: 872378
£ 39,16
£ 9,79 for 1 litre
price incl. 20% VAT, excl. delivery costs
MOBIL Engine oil
5W-30, 5l
Article number: 150944
£ 42,38
£ 8,48 for 1 litre
price incl. 20% VAT, excl. delivery costs
-16%
Article number: V25-0796
compared to
RRP
£ 249,75
£ 209,18
price incl. 20% VAT, free delivery
-61%
SACHS Clutch kit
with central slave cylinder, with clutch pressure plate, with dual-mass flywheel, with flywheel screws, with clutch disc, 230mm
Article number: 2290 601 143
compared to
RRP
£ 993,53
£ 378,72
price incl. 20% VAT, free delivery
-42%
Article number: OE261
compared to
RRP
£ 22,43
£ 12,91
Price per item
price incl. 20% VAT, excl. delivery costs
Based on feedback from Renault Kadjar owners, the following additional problems occur:
| Strengths | Weak points |
|---|---|
| Spacious interior | CVT automatic transmission problems |
| Good road holding | Timing chain TCE engines |
| Modern connectivity | Air conditioning failures |
| Attractive design | Electric mirror defects |
| Versatile engine range | Brake system wear |
| Solid workmanship | Electronic faults |
| Good space | High repair costs |
The Renault Kadjar presents itself as a modern crossover with an attractive design and good use of space, but struggles with considerable technical weaknesses. The most common problems are concentrated in the CVT gearbox, the TCE engines and various electronic systems. Consistent preventive maintenance and early treatment of emerging symptoms can reduce operating costs and improve reliability. Potential buyers should pay particular attention to the known weak points in used vehicles and have a thorough inspection carried out.
BOSCH Spark plug
M 12 x 1,25, Spanner Size: 14
BOSCH Oil filter
M 20 x 1,5, Spin-on Filter
YUASA Battery
12V 70Ah 760A with handles, AGM Battery
ELF Engine oil
5W-30, 5l
PIERBURG Throttle body
Electric
LuK Clutch kit
for engines with dual-mass flywheel, with central slave cylinder, with clutch disc, Check and replace dual-mass flywheel if necessary., 230mm
FEBI BILSTEIN Oil Dipstick
yellow
BOSCH Spark plug
M 12 x 1,25, Spanner Size: 14
FEBI BILSTEIN Manual Transmission Oil
Capacity: 1l, 75W
EIBACH Fender flare
Front Axle, Rear Axle, Eibach Pro-Spacer, Splash Guards