Engines · Nissan
Nissan VQ35 3.5 V6 (VQ35DE and VQ35HR) common problems
The VQ35 is a naturally aspirated 3.5 V6 petrol engine with chain-driven camshafts. In the 350Z it arrived as the DE at launch, in 276bhp and later 296bhp forms, and was replaced in 2007 by the higher-revving HR, which Nissan described as 80% new. It is a strong engine that can cover very high mileages with regular oil changes, and it was also used in other Nissan and Infiniti models such as the Murano and Infiniti G35.
Common problems and what to look for on the VQ35
The known issues most worth checking when you view a car with this engine. None of them means a car is a bad buy, but they're worth knowing about before you buy, and a good history often shows they've been dealt with.
Oil use on the DE
What to look for: Check the dipstick before the engine is started. Ask how often the seller tops up and how much it takes, and look through the history for regular oil changes and any mention of a replacement engine.
Why it matters: The DE engine tends to use some oil, with the 296bhp version most often mentioned, and the catalytic converters hide any blue smoke, so the dipstick is the only way to know. Running it low can damage the engine, and some cars have had a replacement engine earlier in life. A seller who checks the level regularly is a good sign.
Low oil pressure on the HR
What to look for: With the engine fully warm and idling, look at the oil pressure gauge. It should read at least 14 to 15psi. Lower than that is the thing to note, especially on a 2007-on car with the taller bonnet bulge. Ask for paperwork showing the oil gallery gasket has been replaced.
Why it matters: On the HR engine an internal oil gallery gasket can fail and leak oil inside the engine, which lowers oil pressure. The repair is a long job but specialists regard it as a must-do, so a car with that invoice is in a good position.
A ticking noise that rises with revs
What to look for: With the bonnet open and the engine running, listen for a light tick that speeds up as the revs rise. Ask someone to blip the throttle while you listen.
Why it matters: The usual cause is a worn fuel damper. There are two on the engine, and replacing the worn one cures the noise. It is irritating rather than harmful, and not a sign of engine wear.
More known issues, covered in the full guide for each car
- Cam cover gasket leaks
Cars with the VQ35
- Nissan 350Z Z33: DE engine, 2003 to 2006; HR engine from 2007, recognised by the taller bonnet bulge
A pre-purchase inspection guide for your car
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General points for the engine, last checked October 2026. Every car is different, so treat this as a guide to what to look at, not a verdict on any car. CrankSight is independent and has no connection with any manufacturer.