Links to the reviews? If so here are some that I found:
these Monroe OESpectrum struts for non-M and non-AWD (xi) cars are exactly what the vast majority of 1999-2005 3 series owners want when it comes to replacing the tired original Sachs shocks and struts in their car.
Monroe is often associated with cheapness, as is the Sensatrac moniker, but these are actually their OESpectrum line which are what I consider to be the best value for money in this particular vehicle application. the shocks are well constructed using Original Equipment thickness and dimension materials, they have similar rebound, compression and dynamic characteristics to Sachs original BMW shock absorbers but for a small fraction of the price.
What I like about them:
1.) Price. depending on how actively you cross shop, they're between 20 and 50% the cost of an OEM BMW shock
2.) durability. monroe has been around a good long time and they know how to make a shock absorber. have had no oil seepage or undesirable characteristics arise thus far
3.) O.E. look. black housings, look like original parts unlike a rial KYB piece that is clearly an after market piece.
4.) the performance. they claim to be equivalent to original equipment shocks in response and durability. I believe this claim.
bottom line, I would recommend this to a customer or a friend for their car.
I purchased these struts for my 2001 bmw 330i and I was skeptical based on the previous reviews and decided to take a chance. These were the best prices I could find anywhere online and I must say that I couldn't be happier. The car rides smoother and handles much better than it did before. I had forgotten how well this car could ride.
At 115k miles, my wife's 2003 E53 X5 was due for some serious suspension attention. The rears were starting to clunk over bumps, the car felt very loose and uncontrolled, "crashed" over potholes on the road, etc.
I installed Bilsteins on my own E91 (and my E36 before that) because I liked the lifetime warranty, but I admit they stiffened the ride a bit more than I liked for a daily driver. Looking around for alternatives, I found Monroe has a line of premium OESpectrum shocks designed to match the factory valving of certain foreign cars:
MONROE SHOCKS & STRUTS :: OESpectrum® Shocks & Struts
It turns out Monroe also offers a lifetime warranty. I decided to order a set. I got a great price through RockAuto.com, plus I used a 5% discount code.
Wow, what a difference! The car is very well controlled, suspension is perfectly behaved on rough roads, no funny noises or clunks. I never drove a brand new E53, but this is how I would expect a new one to drive. It feels solid and planted in that BMW way without feeling overly harsh. I'm very happy with the purchase - just right for a daily driver, and the driving experience still lives up to the roundel.
Monroe? Seriously? Not on my BMWs.
Not the best out there, but they will be a hell-of-a-lot better than decade-old, blown out original shocks. Perfectly fine for a daily driver, and include a lifetime warranty just like Bilsteins. And we're talking the new (came out two years ago) OESpectrum line which are actually decent. You can get a set of 4 with a rebate for about the price of ONE Bilstein SP/HD strut.
I installed Monroe in my 328i about 9 months ago. I don't have sports suspension. So far can't fault them, they are doing the job just fine.
I don't get why people knock Monroe. Monroe is an OEM supplier to some auto manufacturers. The parts are of extremely high quality and are obviously valved to meet OE-specs. They just dont take one-size-fits-all shocks and shape them to fit the E46. They're nothing fancy or extra sporty, they're just OE-equivalents at a lower price.