About this model
The Opel Insignia A was produced from 2008 to 2017 and replaced the Vectra C as Opel's mid-size sedan. In BiH it is very common, especially the Sports Tourer estate versions imported from Germany as former company cars. The Insignia A was Opel's more serious offering, a step above the Astra, with better cabin materials but also significantly more electronics and sensors. The generation has matured on our roads, and today, with mileages of 200,000-350,000 km, the typical recurring faults are starting to show. This article covers the 2.0 CDTI variant (A20DTH, A20DTJ, A20DTE), which is by far the most common on the BiH market - buyers go for it because of its mix of power, space, and economy.
Engines and variants
This model is most commonly available in BiH with the following engines.
A20DTJ (110/130 hp) — the weaker 2.0 CDTI variant with a fixed-geometry turbo at 110 hp and a variable-geometry one at 130 hp, paired with a 6-speed manual or auto. Fewer turbo issues on the 110 hp version, but the same EGR cooler, DPF, and timing chain problems as the more powerful A20DTH. Typically chosen by buyers whose priority is highway use and low consumption rather than peak power. Spare parts are widely available and cheaper than for the BiTurbo variant.
A20DTH (160 hp) — the most powerful 2.0 CDTI variant with variable-geometry turbo and 350 Nm of torque, the most sought-after in BiH thanks to its power-to-economy ratio. Injectors and the dual-mass flywheel suffer the most due to the high torque, plus the turbo if the owner skips oil intervals. This is the variant we see most often in the shop - buyers pick it because it's strong enough for a fully loaded car on the motorway, and real-world consumption averages 6-7 litres on the open road.
A20DTE (140 hp, ECOFLEX) — Ecoflex version with start-stop and optimised fuel use, focused on the rated economy figures for company fleets. The AGM battery for start-stop is a pricier replacement, and short city trips kill the DPF faster because regeneration often doesn't finish. In BiH practice the real-world consumption difference compared to the A20DTH is small, while the start-stop electronics complications are very real.
A20DTR / B20DTH BiTurbo (195 hp) — twin-turbo 2.0 CDTI variant with two turbos in sequence (sequential), 400 Nm, almost exclusively automatic. The system that switches between the two turbos is the weakest point - valves and actuators cause trouble after 150,000 km, plus the more expensive NOx sensors and AdBlue complications on facelift versions from 2014 onward. Performance is excellent, but maintenance costs are noticeably higher than on single-turbo variants.
Reliability and reputation in the BH market
In BiH, the Insignia A 2.0 CDTI has proven itself as a hard-working motorway car - we see examples easily passing 350,000 km with regular servicing. The engine comes from the Fiat-Opel JTD/CDTI family, which means spare parts aren't an issue: filters, oil, clutch, dual-mass, injectors, all of it is available at any decent parts shop in Banja Luka, and used parts from breakers are a realistic option for mechanical bits. Owners are typically people who drive a lot for work or on long routes, looking for comfort and space with reasonable consumption. The generation's weak point is the serious amount of electronics and sensors, at a level we didn't have in mid-size cars in the early 2000s, which means an older Insignia often "talks" through warning lights more than it actually has serious faults. Compared with a Passat B7 or Mondeo Mk4 from the same period, the Insignia A is the cheapest in terms of used purchase price, but it asks for a more attentive driver who keeps an eye on oil level and doesn't ignore warning lights.
Common faults we see
From practice, here is what most often comes in for repair on this model.
1. Timing chain
Symptom: Rattle from the front of the engine on a cold start, occasional clatter at idle, codes P0008/P0016/P0017 (camshaft-crankshaft correlation), loss of power.
The 2.0 CDTI family (A20DTH/A20DTJ) has a timing chain that, in practice, is not the "lifetime" item it was sold as. On examples with 180,000-250,000 km the tensioner gives up, the guides crack, and the chain stretches enough to shift the timing. If the owner ignores the rattle, the chain can jump a tooth and then the valves get bent too.
Advice: On every used Insignia 2.0 CDTI we listen to the engine on a cold start first. If we hear the typical "clatter" for a few seconds after ignition, we tell the buyer straight that they should plan for a chain kit. We do the full set (chain, tensioner, guides, slipper) together - a half-job comes back.
2. DPF and oil dilution
Symptom: DPF light, loss of power, smell of diesel in the oil, oil level on the dipstick above MAX, increased fuel consumption, limp mode.
The Insignia 2.0 CDTI is a big, heavy car, and in city driving the DPF rarely finishes a regeneration. During active regen the ECU dumps extra fuel into the cylinders, and some of it slips past the piston rings into the sump and dilutes the oil. Drivers who mostly do city miles in BiH come in with oil that "grows" between services, which is a red flag.
Advice: We measure backpressure before sending anyone for a new DPF. Often a clean or a forced regen on the diagnostic tool is enough, plus a shorter oil interval. For owners who only drive in town, we recommend taking the car for a 20-30 minute open-road run above 2000 rpm once a week.
3. EGR valve and EGR cooler
Symptom: Jerky acceleration, rough idle, smoke from the exhaust, engine light with codes P0401/P0402/P0404, occasional coolant loss with no visible trace.
The EGR cooler on the A20DTH is a known weak spot - over time it cracks internally and lets coolant into the intake or exhaust path. The owner notices the coolant level slowly dropping, and in the shop we find white sludge on the EGR valve. The valve itself is also prone to sticking due to soot deposits, especially on examples that have done short trips.
Advice: When we suspect the EGR cooler we run a pressure test on the cooling system, not just a visual check. We don't do software EGR delete - it ruins the DPF and causes problems at the technical inspection. Cleaning the valve and intake manifold is standard, the cooler gets replaced as needed.
4. Injectors (Bosch CRI)
Symptom: Hard cold start, knock under load, rough idle, black smoke, fuel return (rücklauf) above the allowed value on one or more cylinders.
The 2.0 CDTI uses Bosch CRI common rail injectors which are sensitive to fuel quality and filter intervals. Water in the tank, a cheap filter, or a filter left in past its interval are the main culprits. At 200,000+ km we see sets that need refurbishment, especially on cars imported from Germany and then run on cheap local diesel.
Advice: We measure the return flow per cylinder before giving a diagnosis. Often one or two injectors can be sorted instead of replacing the full set. We change the fuel filter every 30,000 km without exception, regardless of what the service book says.
5. Dual-mass flywheel and clutch
Symptom: Knocking on engine start and shutdown, vibrations at idle, jerks when pulling away, clutch slipping under load.
The Insignia 2.0 CDTI has high torque (320-380 Nm) and the dual-mass flywheel takes a lot of stress, especially on 6-speed manual variants. Typical life is 150,000-220,000 km depending on driving style, with shorter life for drivers who often run overloaded or tow trailers. On the automatic (Aisin AF40) there's no flywheel, but other things crop up around the torque converter.
Advice: Clutch and dual-mass go together - the labour around the gearbox is the same and a half-job always comes back. We recommend a genuine LUK or Sachs kit. A solid flywheel-and-clutch kit in BiH is an investment that pays off if you plan to keep the car for another 100,000 km.
6. Turbocharger (variable geometry)
Symptom: Loss of power above 2000 rpm, blue or grey smoke under throttle, whistle from the engine bay, code P0299 (underboost), oil leaking from the air pipes.
The Garrett VGT turbo on the A20DTH suffers from soot and worn bearings - the variable-geometry vanes stick in one position. The main culprit is skipped oil intervals and short city trips that don't let the turbo cool down before the engine is shut off. On cars imported from Germany as former company vehicles, the actual mileage on the turbo is often higher than what the odometer shows.
Advice: Before replacement we try unloading the actuator and mechanical cleaning if it can be reached from outside. If the bearings are already leaking and oil is getting into the intake, the whole turbo gets replaced - cleaning makes no sense at that point. We always change the engine oil after any turbo work.
7. Thermostat and oil cooler
Symptom: Engine takes a long time to warm up, temperature jumping on the gauge, oil and coolant mixing, milky emulsion under the oil cap, unexplained coolant loss.
The oil cooler on the 2.0 CDTI is integrated into the block and over the years the seal gives up, leading to oil and coolant mixing. The thermostat is also a weak point - it often stays open so the engine can't reach operating temperature, which hurts consumption and accelerates DPF wear. Both faults often appear in the same time window on examples with 180,000+ km.
Advice: When we're already doing the thermostat we recommend checking the oil cooler too - access is similar. Milky residue under the cap isn't always a head gasket - nine times out of ten it's the oil cooler. We only check the head once we've ruled out the cooler and thermostat.
8. Sensors (NOx, MAF, differential pressure)
Symptom: Engine light coming on irregularly, occasional limp mode for no clear reason, increased consumption, codes P0101, P2002, P229F (NOx sensor).
The Insignia A facelift (from 2013, especially BiTurbo) has NOx sensors that are expensive and failure-prone. The MAF sensor suffers from oil mist out of the crankcase breather, and the DPF differential pressure sensor gets clogged by soot in its little pipes. On older examples these small sensors cause more headaches for the owner than the major faults themselves, because the car is constantly throwing a code while still physically driving.
Advice: The differential pressure sensor pipes can be cleaned - the sensor doesn't have to be swapped right away. With NOx faults we first check whether the SCR/AdBlue system is actually working properly, because replacing a NOx sensor without reason is an expensive job.
P0299 fault on the Insignia 2.0 CDTI
With this code the ECU is reporting that the turbo isn't producing enough boost pressure (underboost). In practice on the A20DTH motor there are three most common causes: stuck variable-geometry vanes due to soot deposits, a faulty turbo actuator, and leaks on pipes or the intercooler between the turbo and the intake. Before anyone changes the turbo, in the shop we run a smoke test on the entire intake tract, measure the actual boost pressure on the diagnostic tool, and check the actuator. In a lot of cases P0299 gets resolved without a new turbo - just with a seal or a clean.
Service and maintenance
The timing chain on the 2.0 CDTI has no factory-set interval, but from experience we recommend inspection and replacement if needed at 200,000-220,000 km, depending on the oil interval, before it starts to skip. We change engine oil every 10,000-12,000 km using Dexos2 5W-30 spec - the factory "longlife" 30,000 km interval doesn't survive BiH diesel use, especially with our fuel and short trips. We change the fuel filter every 30,000 km without exception. On the Aisin AF40 automatic, gearbox oil should be changed every 60,000-80,000 km - the factory "lifetime" story is marketing, not the reality on BiH roads.
Which oil to use for the Opel Insignia 2.0 CDTI
The spec is Dexos2, viscosity 5W-30 for most climate conditions in BiH. Pick a reputable brand (Castrol Edge, Mobil1, Total Quartz INEO) and change it every 10,000-12,000 km depending on whether you mostly drive in town or on the open road. The factory "longlife" 30,000 km interval, in our conditions, accelerates turbo and chain wear and DPF-related dilution. We don't recommend cheap oils without Dexos2 approval on this engine, even if they're labelled as "universal 5W-30".
Owner tips
- Listen to the engine every time on a cold start - timing chain rattle is the first and most important warning sign on the 2.0 CDTI.
- Before buying a specific example: use the VIN to pull the full history of the car through carVertical. From international registries you usually get real odometer readings by date, recorded accidents, the number of previous owners, and theft or write-off flags. We consider it mandatory before buying any used car, and especially for German imports like the Insignia A, which came in en masse as ex-company vehicles. When paying for the report you can use code GAGA for a 20% discount.
- Check the oil level on the dipstick at least once a month - if it rises instead of dropping, the DPF is diluting the oil with fuel and intervention is needed.
- Change the fuel filter every 30,000 km without exception - a cheap filter or a skipped interval kills the Bosch CRI injectors directly.
- If you mostly drive in the city, take the Insignia for a 20-30 minute open-road run above 2000 rpm once a week so the DPF can finish a regen.
- When buying a used Insignia A, always insist on an EGR cooler inspection and a DPF backpressure check - the two most common hidden faults that owners keep quiet about.
Frequently asked questions
Is the Opel Insignia A 2.0 CDTI reliable to 300,000 km?
Yes, if the owner has done regular servicing and hasn't skipped oil intervals. We see Insignias with 350,000+ km that still drive well. The key is a timing chain done in time, a clean EGR system, and respected fuel filter intervals. If the first owner didn't pay attention, the second and third owners pay for it through turbos, injectors, and dual-mass flywheels.
Which 2.0 CDTI engine is the best choice in the Insignia A?
For most drivers in BiH, the best balance of price and reliability is the A20DTH 160 hp - enough power for the motorway, acceptable consumption, well-developed parts ecosystem. We don't recommend the BiTurbo variant (195 hp) as a first diesel - the two-turbo system is expensive to maintain. ECOFLEX offers small real-world savings while complicating things with the start-stop battery.
How long does the timing chain last on the 2.0 CDTI?
In BiH practice we see the chain start causing trouble between 180,000 and 250,000 km, depending on oil interval and oil quality. The characteristic rattle on a cold start is the first sign - don't ignore it. We do the chain, tensioner, and guides as a kit - the job isn't cheap, but it's far cheaper than the repair if the chain jumps a tooth.
Is it worth fitting LPG on an Insignia A 2.0 CDTI?
No. LPG is only fitted to petrol engines. For the Insignia A as a diesel car, LPG is not an option. If you want an Insignia with LPG, the only realistic variant is the petrol 1.6 or 1.8, but there are far fewer of those examples in BiH than diesels.
What to check when buying a used Insignia A 2.0 CDTI?
A cold engine start is mandatory - listen for chain rattle. Pull the dipstick - if it smells of diesel or is above MAX, the DPF is diluting the oil. Look underneath the car for traces of coolant around the EGR cooler. Ask about the history of injector and clutch replacements. Plan to spend money on at least one of these systems within the first year, even on a well-kept example.
Is the Aisin AF40 automatic on the Insignia reliable?
Yes, but only if the gearbox oil is changed every 60,000-80,000 km. Opel labelled it as "lifetime", but in practice we see the hydraulics start to jerk and lag around 150,000 km if the oil has never been changed. An oil service is the best investment for extending its life.
Coolant is leaking but I can't see a trace - what to check first?
On the 2.0 CDTI there are two typical hidden causes: the EGR cooler leaking internally (coolant ends up in the intake and burns with the fuel), and the oil cooler mixing coolant with the engine oil. Neither is visible from outside. In the shop we run a pressure test on the cooling system and check the look of the oil under the cap. If you see milky residue, nine times out of ten it's the oil cooler, not the head gasket.
If you notice any of these symptoms, stop by the shop - it's better to check early than to repair expensively.