N47 BMW 2.0d engine – is a XNUMX-litre BMW diesel a good option in a used car? We're checking it out!

Diesel units have always tempted with low fuel consumption, great maneuverability and the ability to drive hundreds of thousands of kilometers without major repairs. Unfortunately, this is not always the case with the N47 engine. The problem is related to the cumbersome timing drive solution. N47 engine - what is worth knowing about it?

BMW N47 2.0d engine - technical data

The engine with the designation N47 is a 4-cylinder 1-liter diesel engine. This unit has found its place in small cars of the 1st series, as well as SUVs, such as X3 and X143. Engine emergency power options are 163, 177, 204 hp and XNUMX hp. The 177-strong option seems to be the most problematic. However, there is no rule in this regard. The described BMW engine is characterized by low fuel consumption (especially in small vehicles) and very good torque availability. That's why it's still very popular for 2007-2011 BMW vehicles.

How did you solve the timing in the BMW N47 engine?

Why do many mechanics speak negatively about the design of the 2-litre BMW engine? The problem is not the dual mass flywheel, turbocharger or injectors. The main culprit is the timing chain and how the sprocket is arranged on the crankshaft. The drive consists of 3 chains, 4 sliders and 2 tensioners. At the predecessor (M47), the timing drive changed after 350-400 thousand kilometers, which meant peace of mind with timing service for many drivers. In N47 engines, the failure of this element manifested itself after 100 thousand kilometers.

Problem timing chain and crankshaft

Why are there difficulties with a potentially stable chain? The biggest problem when replacing is that the entire drive is on the side of the gearbox. This requires disassembly of the fuel injection system and disassembly of the entire drive assembly. One option is to remove the gearbox, which also allows you to replace the timing drive. However, the assembly of all elements is so complicated that for proper operation it is recommended to remove the engine in 2.0d N47. What's more, the gear is built into the crankshaft. Therefore, if it is worn out, the shaft must be replaced. And this basically means a major overhaul of the device.

How to recognize a timing error in 2.0 N47?

The best way is simply the attentive ear of an experienced mechanic. If you can't identify the problem yourself, your best bet is to ask for a review with a trusted expert in the field. Of course, such an organoleptic method is not fully effective, but otherwise it is difficult to conduct such a study without disassembly. The tensioned chain makes a characteristic creaking sound.

How much does it cost to replace a timing belt on a 2.0d N47?

If it were not for the disassembly of the assembly and the possible replacement of the crankshaft, a complete timing would not be so burdensome. However, one can only dream of this. The described N47 engine from BMW costs almost 400 euros for a basic replacement of the timing drive. If the use of original parts is added, at least €100 must be added. Another €150 is the cost of replacing the belt and oil pump, which are located in front. The shaft itself is another 400 euros Simple calculations show that in the worst-case scenario, an amount of about 10 euros should be expected. This is really disastrous news for a person who dreams of such a unit.

Is every N47 XNUMX-litre diesel bad?

Two dates are innovative in the case of this construction - 2009 and March 2011. At the beginning, the manufacturer changed the design of the engine, which reduced the problem. Only units manufactured after 2011 are free from the defects of their predecessors. Some drivers could also be helped by the actions of the manufacturer's service department, which, however, did not want to admit the mistake. Therefore, the repair was not carried out widely, but somewhat covertly. However, it may happen that the car you are going to buy has undergone such a service. You can find out about this after checking the history of the car by VIN.

Is it worth it to reach for a car with a diesel 2.0? - Summary

Opinions on this matter are very divided. If there is no information in the available service history about replacing the timing belt, you are likely to need such a repair. The N47 engine and other diesel engines made before 2011 can be a hassle and empty your wallet. So for peace of mind, it's best to look for models similar to the 2012 model. Of course, it's undeniable that older cars will, by definition, cause problems. However, you must be aware of the considerable costs that will await you when the deadlines start to make noise. And they can amount to thousands of zlotys.