VW / Audi 1.4 (CAXA, CNVA, CAXC, CMSA) Engine Problems

The 1.4L TSI CAX (CAXA, CNVA, CAXC, CMSA) petrol engine was produced from 2006 to 2015. During this period, it was installed on cars of several brands belonging to the German concern Volkswagen at once.

For example, they were equipped with models such as the Audi A1 (8X), SEAT Toledo 4, Skoda Octavia A5 (1Z) VW Golf and VW Scirocco.

Read Also: The Most Common VW / AUDI 1.4 TDI (BNM) Engine Problems

1.4 L CAX (CAXA, CNVA, CAXC, CMSA) Engine Specs

Volume (cm3)1390
Power (hp)122
Torque200 Nm
Timing driveChain
Environmental classEuro 4/5
Fuel typeGasoline AI-98
ICE featuresDOHC
Supply systemdirect injection
hydraulic liftersYes
Cylinder blockCast iron R4
cylinder headaluminum 16v
Cylinder diameter76.5 mm
piston stroke75.6 mm
Compression ratioten
Phase regulatorInlet
TurbochargingKKK K03
Engine oil3.6L 5W-30
Average resource300,000 km

1.4 CAX Engine Reliability and main advantages

1.4 CAX (CAXA, CNVA, CAXC, CMSA) is an in-line engine with 4 cylinders in a cast-iron block, 16 valves and 2 camshafts. It also has a turbine from Mitsubishi, which gives boost up to 0.8 bar.

Plus, it uses a flapless intake manifold, direct injection, injection power, individual coils for each spark plug, a steel crankshaft, a high-performance oil pump.

In general, the 1.4 CAX (CAXA, CNVA, CAXC, CMSA) engine exists in 2 versions, which differ only in power. The basic version is designated as CAXA, its power is 122 hp. The second version is labeled CAXC, it develops 125 hp.

Read Also: Most Reliable (VAG) Volkswagen Audi Gasoline & Diesel Engine

Disadvantages and problems of the 1.4 CAX Engine

  1. One of the main problems of the 1.4 CAX (CAXA, CNVA, CAXC, CMSA) engine is that the timing chain can stretch very quickly here. This can happen after 40,000 km of run.
  2. And, for example, a strange crack coming from the internal combustion engine while driving can indicate stretching. How to solve this problem? Obviously, the chain needs to be changed.
  3. Also, this 1.4 CAX (CAXA, CNVA, CAXC, CMSA) engine may stop producing stable traction at high speeds. Such a malfunction occurs suddenly, and, as a rule, is caused by a jammed turbine stem and bypass valve.
  4. It is also important to note that the 1.4 CAX (CAXA, CNVA, CAXC, CMSA) engine is very sensitive to the quality of gasoline. Formally, AI-95 is also suitable for it, but it is better to pour AI-98.
  5. The fact is that bad fuel leads here to the appearance of carbon deposits on the nozzles, and this, in turn, can cause piston failure.

1.4 CAX Engine Tuning prospects

Now you can easily do chip tuning of the 1.4 CAX (CAXA, CNVA, CAXC, CMSA) engine – ready-made firmware is available. And this procedure, with a skillful approach, will increase the power of this engine to 150 hp.

In addition, other positive effects can be achieved. After chip tuning, even at the lowest revs, the engine will respond well to pressing the gas pedal. In addition, traction will noticeably increase at all speeds (that is, the dynamics of the car will become much better), and fuel consumption will also decrease. According to some reviews, savings immediately after flashing – up to 1 liter for every 100 km.

Read Also: Which Volkswagen Engine To Avoid? This 6 Type

1.4 CAX (CAXA, CNVA, CAXC, CMSA) Engine applicability

  • Audi : A1 (2010-2014)
  • Seat : Toledo (2012-2015)
  • Skoda : Octavia (2008-2013), Rapid (2012-2015), Yeti (2010-2015)
  • Volkswagen : Golf (2007-2013), Jetta (2007-2014), Passat (2007-2014), Scirocco (2008-2014), Tiguan (2010-2015), Eos (2007-2015)
5/5 - (15 votes)

Leave a Comment