LIQUI MOLY Gear-Oil Leak Stop | 50 ml | Oil additive | SKU: 1042

I own a BMW 430d and recently noticed oil collecting underneath the vehicle. After checking it over, I found it was seeping from the rear differential. My initial thought was that the drive shaft seals were likely worn and would need replacing, so I took it for a proper inspection. Before going ahead with what could have been an expensive repair, my mechanic suggested trying a seal-conditioning additive first. I decided to give it a chance, and the improvement wasn’t immediate, but over time I started to see a real difference. The leak slowly reduced and eventually stopped altogether. I’ve since checked the oil level again and it hasn’t dropped at all. From what I understand, it works by helping to restore and swell ageing rubber seals, improving their ability to hold oil. In my case, it seems to have done exactly that. What could have turned into a costly diff repair has ended up being resolved for a fraction of the price. The underside of the car is now dry and everything is working as it should. Overall, I’m genuinely impressed — it worked far better than I expected.

I don't review often, but this deserves one! I had a significant leak in a front diff, possibly caused by water contaminated oil after having played in some deep floods in my 4x4 a few months previously. The leak was severe, literally puddles of oil overnight or even just parking for an hour or two. The leak was coming from the pinion shaft seal. To replace the seal involves removing the diff from the car, in my case (Grand Vitara 115k miles), the entire front suspension subframe assembly needs to be removed in order to extricate the diff; a huge job, not a job I could comfortably complete myself at home despite being very experienced in car mechanics. Even replacing the seal itself is fairly involved. I would imagine I'd be looking at a bill in excess of £500 at an independent garage, main dealer 1K plus. Anyway, I drained the old contaminated oil, refilled, ran it for a few miles, drained again, then refilled including a tube of the Liqui Moly. Results were slow but over the course of 4 weeks the leak began to lessen and ultimately stop completely. I've topped up the oil once in that time and bought another tube of the Liqui Moly as I could see that it was working and I wanted to give it another dose. However, I removed the fill plug again tonight to squirt in another tube (for good measure) but the level this time was exactly the same, it's lost nothing since the last top up (approx 2 weeks ago). No more leak, at all. This is incredible stuff. Any bad review for this is probably unfair and for an unrelated issue, this is designed to regenerate the condition of rubber oil seals. It has done exactly that. A lot of money saved, thank you Liqui Moly!

Slight weep on bmw 116 d differential, put whole tube in and 3yrs later still not leaking

For small losses something does

Still getting a leak ,hard to know if the casing is beyond repair or the oil stop isn’t working..still topping up with oil..but can’t be buying a tube of this at every top Up either

I didn't think it would but it does. Much reduced gearbox leak in my classic Stag. Highly recommended.

Does wot it says. Protects metal surfaces, even packs out wear and tear on older engines. I always use tbis for engines and gearboxes. It works for me.

I used this in a big older gearbox which has been leaking for years. While it has not completely stopped the leak, it has greatly subsided. Definitely recommended.

Bmw x5 e53 Differential hinten hatte ich massiven öl Verlust aber das mitel hat super funktioniert gestern nach 7000 tauschen Kilometern habe ich es auf der Hebebühne kontrolliert und kein Öl Verlust mehr ich bin zufrieden mal sehen wie lange es noch hält werde öfters mal nachschauen super

オイル漏れ無くなった

Excelente producto, se acabó la fuga que tenia en el reten trasero

Buen producto Llo lo euti lizado para caja de canvio i perfeto

I bought it for my Xterra which had a minor leak, garage quoted me 1000aed for labor only the leakage was around 1 liter per month. After using this product the the gauge showed no leaks. The import thing to note is that it takes around 15 days to stop the leakage.