Valve cover gasket leak
Attaches to N52 at engine level · Engine · carried by 18 variants across 8 chassis
Overview
Valve cover gasket leak is a common fault recorded against N52 at engine level, typically from 90–160k km. It shows up as burning oil smell after a drive, oil residue down the exhaust side of the block, occasionally smoke from the bay. Where it's documented, the repair runs €250–€500 (gasket and coil seals at an independent, costs dated 2026-07), and it can be checked before you buy. 18 variants across 8 chassis in this database inherit it.
What happens
Symptom. Burning oil smell after a drive, oil residue down the exhaust side of the block, occasionally smoke from the bay.
Cause. The gasket hardens with heat cycles. Standard age-related failure rather than a design fault.
How to check it
Static checks
Look along the exhaust side of the head for wet oil and baked residue on the manifold heat shield.
Engine off, ideally on a lift.
Every variant that carries this
| Variant | Chassis | Body | Years | Risk | Good buy | Cost as % of good buy |
|---|---|---|---|---|---|---|
| 323i N52 | E90 | sedan | 2005–2007 | R2 | €4,050 | 9% |
| 323i N52 | E91 | wagon | 2005–2007 | R2 | €4,300 | 9% |
| 323i N52 | E92 | coupe | 2006–2007 | R2 | €4,650 | 8% |
| 325i N52 | E90 | sedan | 2005–2007 | R2 | €4,750 | 8% |
| 325i N52 | E91 | wagon | 2005–2007 | R2 | €5,050 | 7% |
| 325i N52 | E92 | coupe | 2006–2007 | R2 | €5,450 | 7% |
| 325i N52 | E93 | convertible | 2007 | R2 | €5,350 | 7% |
| 328i N52 | E90 | sedan | 2006–2011 | R2 | €5,150 | 7% |
| 328i N52 | E91 | wagon | 2006–2012 | R2 | €5,450 | 7% |
| 328i N52 | E92 | coupe | 2006–2013 | R2 | €5,950 | 6% |
| 328i N52 | E93 | convertible | 2007–2013 | R2 | €5,750 | 7% |
| 330i N52 | E90 | sedan | 2005–2007 | R2 | €5,600 | 7% |
| 330i N52 | E91 | wagon | 2005–2007 | R2 | €5,950 | 6% |
| 330i N52 | E92 | coupe | 2006–2007 | R2 | €6,450 | 6% |
| 125i N52 | E82 | coupe | 2008–2013 | R2 | €7,000 | 5% |
| 125i N52 | E88 | convertible | 2008–2013 | R2 | €7,400 | 5% |
| 130i N52 | E87 | hatchback | 2005–2011 | R2 | €7,000 | 5% |
| 130i N52 | E81 | hatchback | 2007–2011 | R2 | €6,800 | 6% |
The last column is the point. The same repair is an inconvenience on one variant and a reason to scrap the car on another. A failure costing a quarter of the vehicle's value changes the purchase decision regardless of how rare it is.