Lexus RC 350 F Sport

The 2GR-FSE engine used in 2015-2017 RC 350 models has a known design issue where the 5th cylinder does not receive adequate cooling. Over time, this causes the cylinder wall to overheat and score. The first symptom is typically increasing oil consumption, progressing to visible scoring on the cylinder wall. Because the thin aluminum liners are cast into the block, boring is impossible and the entire engine block must be replaced. A used replacement engine costs approximately €2,000-4,000, with labor adding €1,500-2,000. This issue does not affect the updated 2GR-FKS engine used from 2018 onwards. While the problem is well-documented in forum discussions, it appears to affect a minority of cars rather than being universal. Monitoring oil consumption carefully on pre-2018 models is essential.

Both the 2GR-FSE and 2GR-FKS engines share a tendency for premature water pump and ignition coil failures. The water pump typically fails between 80,000-130,000 km and costs €400-700 including labor. Ignition coils can fail individually, usually between 60,000-120,000 km, at approximately €100-150 per coil including labor. The rear bank coils are more expensive to replace due to intake manifold removal being required for access. Symptoms of water pump failure include coolant leaks and rising temperature gauge. Coil failure causes misfires, rough running, and a check engine light. Neither issue is catastrophic if caught early, but both are more frequent than expected for a Toyota/Lexus product.

A widespread recall affecting approximately 700,000 Toyota and Lexus vehicles covers defective low-pressure fuel pumps manufactured by Denso. The impeller inside the pump can absorb excessive moisture, causing it to deform and eventually fail. If the pump fails, the engine stalls while driving. The recall covers 2015 and 2018-2019 RC 350 models. The repair involves replacing the fuel pump assembly and is free of charge at any Lexus dealer. However, if buying used, it is critical to verify this recall has been completed. Unrepaired vehicles can stall without warning at any speed. The risk rating reflects the likelihood of encountering an unrepaired example.

Multiple RC 350 owners report the passenger side of the climate system blowing warm or hot air while the driver side operates normally. The cause is a failing air blend door servo motor on the passenger side. Lexus issued a TSB for this issue covering 2013-2017 models. Diagnosis requires Lexus Techstream software to identify which servo motor has failed. The part itself costs around €100-200, but labor can be significant (€200-500) as the dashboard may need partial removal for access. Some owners report the issue recurring after repair if the replacement servo motor is of similar quality.

The Lexus Remote Touch interface and navigation system can freeze intermittently, leaving the driver unable to control audio, navigation, or climate settings through the infotainment screen. The issue is caused by software bugs, and Lexus has released multiple over-the-air updates to address it. One update was itself problematic, causing a reboot loop on some 2014-2016 models. Most cases resolve by holding the power button for 10-15 seconds or turning the car off and restarting. In rare persistent cases, the head unit may need a dealer software reflash (€100-200) or replacement (€300-400 for a used unit). This is an annoyance rather than a safety issue.

A limited service campaign covered 2015 RC 350 and RC F models where sealant was not properly applied to the inner portion of the rear fender arch during manufacturing. This allowed water and road salt to penetrate the panel, causing corrosion. Lexus offered free inspection and anti-rust treatment until March 2018. Cars that were not repaired during the campaign period may show bubbling paint or surface rust on the rear arches. Repair costs vary from €300 for surface treatment to €1,500 if bodywork and paint are required. This only affects early 2015 production vehicles.