EA113 2.0 TFSI Problems: Cam Follower, Timing Belt and What to Check

The EA113 2.0 TFSI — the turbocharged, direct-injection four in the Mk5 Golf GTI, the 8P Audi A3 and S3, the Mk2 Leon Cupra, the Mk2 Octavia vRS and the Mk6 Golf R — runs a rubber toothed timing belt, not a chain. That is the single most important thing to know about it, because it is an interference engine: if the belt is neglected and lets go, the pistons meet the valves and the damage is expensive. Its signature fault is wear of the small bucket-shaped follower that sits under the high-pressure fuel pump; ignored, it wears through and starts eating the camshaft lobe behind it. After those two, the usual complaints are the diverter valve, carbon build-up on the intake valves and a tired crankcase breather (PCV) — all of which are well understood, well supported by parts, and none of which stop this being a strong, likeable and famously tuneable engine.

Which cars got it, and how to be certain yours has one

EA113 is a family name that also covers the older 1.8T 20V. This guide is about the 2.0-litre turbocharged direct-injection version — turbocharged only, single turbo, never supercharged and never twincharged. It was fitted across the group in the mid-to-late 2000s, then carried on in the high-output cars after the ordinary models had already moved to the chain-driven EA888.

Identify it by engine code, not by model year, badge or power figure. The code is on your service book or build sticker, stamped on the block, and readable electronically from the ECU. Engine codes in this family include AXX, BGB, BPG, BPY, BUL, BWA, BWE, BWJ, BYD, BYK and BHZ, along with the later CDL codes used in the Mk6 Golf R, the TTS, the later 8P S3, the Mk2 Leon Cupra R and the original Scirocco R — CDLA, CDLB, CDLC, CDLF and CDLG. That list is not exhaustive, so a code you cannot find on it needs checking rather than assuming; many, but not all, of the codes outside it belong to the chain-driven EA888. The two engines are different, with different faults, and problems do not transfer in either direction.

Be careful with the CDL codes in particular. Sharing the first three letters does not guarantee the same timing arrangement: the facelift 280PS Scirocco R carries the code CDLK, and that engine is widely reported to run a chain rather than the toothed belt described in this guide. If your car is a CDLK, treat everything below about belt replacement as something to verify against the car in front of you before you act on it. This is exactly why the code matters more than the badge.

Two traps catch people out repeatedly. First, the same model can have either engine depending on generation, year and trim: the Mk6 Golf R is EA113 and belt-driven, while the Mk6 GTI parked next to it is EA888 and chain-driven; the early 8J Audi TT 2.0 TFSI is EA113, the later facelift car is EA888; the B7 A4 2.0 TFSI is EA113, the B8 that replaced it is EA888; the pre-facelift Scirocco R is belt-driven, the facelift car is not. Second, badges do not track engines — a Mk2 Leon Cupra, a Mk2 Octavia vRS and a Mk5 Golf GTI can share a code, while two cars wearing identical badges a few years apart very often do not.

• Roughly 200PS versions (Mk5 Golf GTI, early 8P A3, B6 Passat, Mk2 Octavia vRS, Mk5 Jetta GLI, early Eos, early 8J TT) generally run the smaller K03-type turbo.
• Higher-output versions — Golf GTI Edition 30 and Pirelli, Mk2 Leon Cupra and Cupra R, S3 8P, TTS, Mk6 Golf R and the original 265PS Scirocco R — run the larger K04-type turbo. Outputs and exact codes vary by market.
• The related naturally aspirated 2.0 FSI is also belt-driven and also has a cam-driven high-pressure fuel pump, so the follower point below applies to it too.
• If you cannot confirm the code from paperwork, have it read from the ECU before you buy. It changes what servicing the car needs.

The timing arrangement: it has a belt, and the belt is a safety item

On the belt-driven codes above, the camshafts are driven by a rubber toothed belt at one end of the engine, behind a plastic cover you can see under the bonnet. The belt turns the exhaust camshaft, and a short chain inside the cylinder head at the opposite end links that camshaft to the intake one, where the variable valve timing lives. The presence of that small internal chain is why some owners are told, wrongly, that the engine is 'chain-driven' and needs no belt change. It does. On this engine the belt is a scheduled replacement item along with its tensioner and idler pulleys.

The water pump on this family is driven by the timing belt, which is why it is normal practice to replace the pump at the same time — getting to it later means doing most of the same work twice. Replacement intervals differ by model year, market and whether the car has been on a fixed or flexible service regime, so check your own schedule rather than trusting a figure from a forum. If the history does not show a belt change with a dated invoice and a parts list, assume it is due and budget for it. A verbal 'it's been done' is not evidence.

• Stop driving and get it inspected if you hear a rhythmic squeal, chirp or rattle from the belt end of the engine, or see coolant weeping from behind the belt cover — a failing pump or tensioner can take the belt with it, and on an interference engine a snapped belt means bent valves.
• If the red oil pressure warning light ever appears, stop as soon as it is safe, switch off and do not restart. Continuing on low oil pressure destroys bearings, and the recovery truck is always cheaper than the engine.
• A rattle from the far end of the cylinder head on a cold start is worth investigating properly — that is where the cam-to-cam chain and its oil-fed hydraulic tensioner live, and on high-mileage engines they do wear.

The cam follower: the fault that eats camshafts

This is the one to care about. The high-pressure fuel pump sits on the back of the cylinder head and is driven by a multi-lobed cam. Between the cam and the pump is a small hardened bucket — the cam follower. Its wear-resistant coating can wear through, then the steel behind it wears through, and once there is a hole the pump plunger grinds directly into the camshaft lobe. At that point you are looking at a camshaft, a pump, metal debris through the oil, and a very bad day.

Caught early, replacing the follower is a modest job: it is a small, inexpensive part reached by removing the pump. Caught late, it is one of the most expensive failures this engine has. Treat it as a routine inspection item, not fit-and-forget — many specialists pull the pump and look at the follower face at servicing. Revised followers and uprated aftermarket versions exist, and later engines were built with harder cam lobes, but even those should still be checked; an upgraded part reduces the risk, it does not remove the need to look.

Warning signs are worth learning: a long crank or reluctant hot start, rough or hunting running, a noticeable loss of power or a drop into limp mode, and low fuel pressure codes. If those appear together, stop driving the car and have the follower inspected before anything else. Continuing in the hope it is 'just a sensor' is how a cheap part turns into a camshaft.

The rest of the weak points, roughly in the order they bite

None of these are engine-killers, and all are familiar to any VAG specialist. They are simply what wears out on a car of this age and design.

• Diverter valve. The turbo's recirculation valve is a known consumable. The original type used a rubber diaphragm that could split; a later piston-type valve replaced it and is the usual fix. Symptoms are a flat spot, hesitation on part throttle, boost that fades under load, and sometimes a fluttering noise. Cheap and quick to change.
• Carbon on the intake valves. This engine injects fuel directly into the cylinder, so no petrol washes over the back of the intake valves. Deposits build up and eventually cause lumpy cold idle, misfires, hesitation and a general dullness. The fix is physical cleaning — walnut-shell blasting or manual work — and it is a half-day at a specialist rather than a service item. How quickly it builds up depends heavily on how the car is used; short cold journeys are the worst case.
• PCV / crankcase breather. The breather valve on top of the engine fails with age. You get a rough or high idle, a whistling or hissing noise, lean running and, if it is left long enough, enough crankcase pressure to push oil past seals or unseat the dipstick. A quick check: with the engine idling, slacken the oil filler cap — a strong suction on the cap, or a big change in idle when it comes off, points at the breather system.
• Ignition coils and plugs. These engines are sensitive to tired coils and worn plugs; misfires under load are often nothing more sinister. Replace as a set if one has gone.
• Purge valve, boost control solenoid and vacuum hoses. Perished hoses and a leaking evaporative purge valve cause lean codes and odd idling, and are easy to overlook because they are cheap.
• Coolant leaks. Plastic housings and thermostat assemblies harden and weep with age. Check for crusty residue around the thermostat housing and expansion tank.
• Oil consumption. Some use is normal, but heavy consumption is more associated with a later, different engine family — do not simply assume it here. Check the level regularly and investigate if it is genuinely drinking.

What to check on a test drive or pre-purchase inspection

Go and see the car cold. Most of what is worth finding shows up in the first minute of running and disappears once everything is warm.

• Cold start: it should catch quickly and settle. A long crank, a stumble, or a rattle that fades is a reason to look further, not to shrug.
• Confirm the engine code before anything else, then ask for the follower inspection history and the timing belt invoice. An owner who can produce both is telling you a lot about the rest of the car.
• Drive it under load in a high gear from low revs. Hesitation, a hollow spot or a sudden drop in urge suggests the diverter valve, a boost leak or fuelling trouble.
• Listen at idle with the bonnet up for hissing or whistling, and do the oil filler cap test for the breather.
• Look for oil around the cam cover and the back of the engine, and coolant staining anywhere.
• Check for modifications. These engines are commonly remapped, and a K04 conversion or a big power figure raises questions about the clutch, the turbo and how hard the car has lived. Modification is not automatically bad, but it should be disclosed and documented.
• Check the gearbox on its own terms. Many were sold with the six-speed wet-clutch DSG; feel for judder from a standstill, hesitation between gears, and ask whether the gearbox oil and filter service has been done — the interval varies by model and market, and it is often skipped.
• After the drive, look under the car for fresh drips and check the oil level and condition.

The fault codes and live values it commonly throws

Codes point you at a system, not a part — several of the ones below can be caused by more than one thing, which is why the live data matters as much as the code list.

Reading stored codes across every module and watching the live measuring values is the fastest way to separate these. VAGPULSE — Windows software plus a cable, bought once — scans every module in the car and shows those live blocks, so you can compare specified against actual fuel rail pressure, requested against actual boost, per-cylinder misfire counts and fuel trims while the engine runs. That is how you tell a worn follower from a faulty sensor, or a split diverter valve from a boost leak, instead of replacing parts in hope.

• P0087 — fuel rail/system pressure too low. The classic worn-follower code, but also possible from the pump itself, the low-pressure side or a sensor.
• P2293 — fuel pressure regulator performance. Often appears alongside the above.
• P0300 with P0301–P0304 — random or per-cylinder misfires. Think coils, plugs, carbon, injectors.
• P0299 — turbocharger underboost. Diverter valve, boost leak, wastegate control or a hose off.
• P0171 and P2279 — running lean and an intake system leak. Breather, purge valve or a split pipe.
• P0507 — idle speed higher than expected. Very often the crankcase breather.
• P0011 and P0016 — camshaft timing and crank/cam correlation. Worth taking seriously on a belt-driven engine; have the timing checked rather than clearing it and driving on.
• Some tools show VAG-specific five-digit codes instead of P-codes for the same fault, so do not be alarmed by an unfamiliar number format.

So is it a good engine?

Yes, with conditions. The EA113 2.0 TFSI is well regarded for good reasons: it is strong, it responds unusually well to sensible tuning, parts and specialist knowledge are everywhere, and the failure modes are known and documented rather than mysterious. The cars it powers are still enjoyable and still sought after.

The conditions are simple. Keep on top of the timing belt and water pump with dated evidence, inspect the cam follower rather than hoping, use a good oil to the correct specification and change it more often than the longest interval allows, and treat a lumpy idle or a flat spot as information rather than a quirk. An EA113 with a folder of receipts is a much better buy than a newer car with none, and most of the horror stories attached to this engine trace back to deferred maintenance rather than to the design.

Common questions