MajorCommonEngine

Volvo XC90: B6294T Rear Main Seal Oil Leak

B6294T Rear Main Seal Oil Leak is a common engine fault on the Volvo XC90 on the 2002–2014 cars, and we rate it major. Putting it right costs $900 to $2,000 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 27 documented faults on the Volvo XC90.

Vehicle: Volvo XC90
Engine: 2.9L
Years: 2002–2014
Fuel: petrol
Gearbox: auto
System: Engine

This page covers the Volvo XC90 as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Volvo XC90 faults27 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph for this fault yet. We would rather show none than show a picture of something else.

What goes wrong

The B6294T 2.9T inline-six used in first-generation XC90 T6 models develops rear main crankshaft seal leaks as the seal hardens with age. Oil seeps from behind the flywheel onto the transmission bellhousing and drips onto the exhaust system. The repair requires transmission removal, making it a significant labour job. This fault is widely documented on XC90-specific forums and Volvo specialist workshop reports as a predictable high-mileage failure.

What you would notice

Oil drips from the bellhousing or rear of the engine
Burning oil smell from exhaust when driving
Oil residue on the top of the transmission casing
Gradual oil level drop without visible external leak elsewhere

How to check it

Where to look. Rear of engine block, crankshaft rear main seal, accessible only after transmission removal

Inspect the rear of the engine block at the transmission bellhousing junction with a torch and mirror.
Look for oil staining on the transmission front face, flywheel housing, and surrounding underfloor area.
Check current oil level and ask for any history of oil top-ups.

What it costs to put right

$900 to $2,000 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has the rear main seal been replaced?”
“Is there any oil dripping from the underside of the car?”
“How often does the oil level need topping up?”

Now check the Volvo XC90 you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Volvo XC90 buyer questions

Is b6294t rear main seal oil leak serious on a Volvo XC90?

We rate it major and common on the Volvo XC90. The B6294T 2.9T inline-six used in first-generation XC90 T6 models develops rear main crankshaft seal leaks as the seal hardens with age. Oil seeps from behind the flywheel onto the transmission bellhousing and drips onto the exhaust system. The repair requires transmission removal, making it a significant labour job. This fault is widely documented on XC90-specific forums and Volvo specialist workshop reports as a predictable high-mileage failure.

How much does it cost to fix on a Volvo XC90?

$900 to $2,000 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Volvo XC90 years are affected?

Our research records this fault on the 2002–2014 Volvo XC90. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Inspect the rear of the engine block at the transmission bellhousing junction with a torch and mirror. Look for oil staining on the transmission front face, flywheel housing, and surrounding underfloor area. Check current oil level and ask for any history of oil top-ups. Look here: Rear of engine block, crankshaft rear main seal, accessible only after transmission removal