Parts for your 2006 Toyota Vitz|yaris-Egr valve

2006 Toyota Vitz/Yaris EGR valve: what’s fitted and what isn’t

For 2006 Toyota Vitz/Yaris models sold in Australia and New Zealand with petrol engines (1.0 1KR‑FE, 1.3 2SZ‑FE, 1.5 1NZ‑FE), an external EGR valve is not fitted. The only 2006 Vitz/Yaris that uses an EGR valve is the 1.4 D‑4D diesel (engine code 1ND‑TV), which also employs an EGR cooler.

Why the difference? On those small Toyota petrol engines, EGR hardware wasn’t needed to meet the emissions rules of the day. Instead, Toyota’s VVT‑i system uses valve timing to create “internal EGR” (a controlled amount of exhaust retained in‑cylinder) to keep NOx down. That approach simplifies the engine package, avoids a soot‑prone EGR circuit, and helps keep the intake clean. By contrast, the 1.4‑litre diesel relies on a proper EGR valve and cooler to curb NOx because diesel combustion produces higher NOx levels and benefits more from cooled exhaust gas recirculation.

• Petrol variants (1KR‑FE, 2SZ‑FE, 1NZ‑FE): No external EGR valve.
• Diesel variant (1ND‑TV 1.4 D‑4D): EGR valve and EGR cooler fitted.

What this means for servicing in AU/NZ: owners of 2006 petrol Vitz/Yaris won’t have an EGR valve to service or replace. If a scan tool flags an “EGR” fault on a petrol model, it’s usually a generic code set by the tool profile, not a component actually present. Typical drivability or emissions care on these petrol engines focuses on the PCV system, throttle body cleanliness, air leaks, spark, and correct VVT‑i operation.

For the 1.4 D‑4D diesel, the EGR valve is a normal service consideration. High‑kilometre urban use can lead to soot build‑up in the valve and cooler, causing rough idle, limp mode, or smoke. Cleaning or replacement (valve assemblies often referenced under Toyota EPC part numbers in the 25620‑xxxxx range, with a matching EGR cooler 25601‑xxxxx) is common, along with checking the vacuum control and the EGR passages in the intake manifold.

Technical sources referenced:

• Toyota Repair Manual (Yaris/Vitz XP90, 2005–2010): Engine Control – SFI System descriptions for 1KR‑FE, 2SZ‑FE, and 1NZ‑FE note no external EGR system and describe VVT‑i internal EGR function.
• Toyota New Car Features (NCF) for 1NZ‑FE/1KR‑FE family: describes NOx control via valve timing and absence of EGR hardware on petrol variants.
• Toyota EPC (parts catalogue) for 2006 Yaris/Vitz: no EGR parts listed for petrol engines, EGR valve and cooler listed for 1ND‑TV diesel.
• Haynes Owners Workshop Manual for Toyota Yaris (1999–2009): EGR equipment detailed on diesel models, not applicable to petrol models.

• Does a 2006 Toyota Vitz/Yaris have an EGR valve?
  On petrol models (1KR‑FE, 2SZ‑FE, 1NZ‑FE), no. On the 1.4 D‑4D diesel (1ND‑TV), yes—there’s an EGR valve and cooler. If it runs on petrol in AU/NZ, it almost certainly doesn’t have an EGR valve.
• How can someone tell which engine they’ve got?
  Check the build plate or the registration data for the engine code. Petrol codes will read 1KR‑FE, 2SZ‑FE or 1NZ‑FE. Diesel is 1ND‑TV. Under the bonnet, diesel cars have an EGR cooler and valve assembly mounted near the exhaust/intake side.
• What EGR maintenance applies to the 1.4 D‑4D diesel?
  Expect periodic cleaning of the EGR valve and cooler, especially with lots of short trips. Symptoms like surging, rough idle or black smoke can point to a sticking valve. Replacement is straightforward for a qualified technician, pairing it with intake manifold cleaning and checking vacuum lines gives the best result.