1999-2002 Acura RL Tail Light: Solving Water Leaks and Amber vs. Clear Lens Confusion
This guide details common failures like water leaks, explains the critical 2003 lens change, and shows what to look for when buying a used assembly.
- The primary failure is water leaking into the housing from an aged seal, causing corrosion and electrical issues.
- 1999-2002 models have amber turn signal lenses; 2003-2004 models have clear lenses. The assemblies are interchangeable but will not match cosmetically.
- New OEM assemblies are discontinued, making used OEM parts the most common replacement option.
- A known safety recall for the brake light switch can cause the brake lights to fail and should be checked with a dealer.
Is This the Right Part? Amber vs. Clear Turn Signals
The first-generation Acura RL had a major redesign for the 1999 model year, which included new tail lights. These lights remained physically interchangeable through 2004. However, there is one crucial cosmetic difference a buyer must know:
- 1999-2002 Models: Came from the factory with an amber colored lens over the turn signal portion.
- 2003-2004 Models: Featured a redesigned tail light with a clear lens over the turn signal, sometimes called a "candy cane" or "Altezza" style.
While a 2003-2004 light will bolt onto a 1999-2002 car, it will not match the original appearance. If you are replacing only one side, it is essential to match the lens style to your existing light to ensure a correct and symmetrical look.
Symptoms of Failure
Tail light issues on the Acura RL often go beyond a simple burnt-out bulb. The most common problems stem from the failure of the assembly's seal over time.
1. Water or Condensation in the Housing
The most frequent complaint is finding moisture, fogging, or even standing water inside the tail light lens. This is a clear sign that the factory gasket or seal between the lens and the housing has failed due to age and weather exposure. This moisture is not just a cosmetic issue; it is the root cause of most other electrical problems.
2. Dim, Flickering, or Non-Working Lights
When water gets inside the assembly, it corrodes the metal bulb sockets, connector pins, and the flexible circuit board that supplies power. This corrosion creates poor electrical connections, leading to:
- Lights that flicker or work intermittently.
- Bulbs that appear dimmer than the other side.
- Complete failure of one or more functions (e.g., the tail light works, but the brake light doesn't).
3. Rapidly Burning Out Bulbs
If you find yourself replacing the same bulb every few months, the cause is likely moisture or corrosion in the socket. The corrosion can cause voltage spikes or shorts that drastically shorten the life of the bulb filament.
4. Blown Fuses
In some cases, a tail light issue can be traced to a blown fuse. On the Acura RL, owners have reported that a blown "small lamp fuse," often located in the under-hood fuse box, can cause the tail lights and sometimes the interior dashboard lights to stop working simultaneously. If both tail lights and other unrelated lights go out at the same time, check your fuses before replacing any parts.
Related Safety Recall: While not a recall on the tail light assembly itself, many 1999-2002 Acura RL models were recalled for a faulty brake light switch. Oil could contaminate the switch, preventing the brake lights from illuminating when the pedal is pressed. It is crucial to verify with an Acura dealer if your vehicle has had this free repair performed, as failed brake lights create a significant risk of a rear-end collision.
Buying a Used 1999-2002 Acura RL Tail Light
Since new OEM tail light assemblies for this model are now discontinued, the used market is your primary source for replacements. A good used OEM part is often a better choice than a cheap aftermarket alternative due to superior plastic quality, correct lens optics, and precise fitment. Here’s what to inspect before you buy.
- Verify the Lens Style: First, confirm you are buying the correct 1999-2002 style with the amber turn signal lens.
- Inspect for Cracks and Scratches: Check the entire lens surface for hairline cracks, especially around the mounting points. Even a small crack will allow water to enter. Minor surface scuffs can be polished out, but deep scratches or cracks mean the part should be rejected.
- Check the Seal: Look closely at the seam where the clear/red lens is bonded to the black plastic housing. Look for any signs of separation, flaking sealant, or previous attempts to re-glue it. This is the most common failure point.
- Examine the Bulb Sockets and Connectors: If possible, inspect the back of the assembly. Look for any white or greenish corrosion on the metal contacts inside the bulb sockets. While minor corrosion can sometimes be cleaned, heavy buildup indicates long-term water damage and the part should be avoided.
- Look for Internal Haze or Water Lines: Hold the light up and look inside. A faint, hazy film on the inside of the lens or a visible "water line" from where water once pooled are red flags that the seal is bad, even if it's dry now.
Pro Tip: Before installing a used tail light, it's a wise preventative measure to apply a thin bead of clear, automotive-grade silicone sealant around the entire seam where the lens meets the housing. Let it cure completely before installation. This can dramatically extend the life of the assembly by reinforcing the factory seal.
Cost Comparison
The discontinuation of the new OEM part makes a quality used OEM assembly an excellent value.
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM | N/A | This part is discontinued by Acura and no longer available new. |
| New Aftermarket | $70 - $120 | Availability can be limited. Quality of plastic and seals may not match OEM standards, potentially leading to premature failure. |
| Used OEM | $50 - $150 | The most common and cost-effective option. Price varies by condition and seller. |
| Shop Labor | $40 - $80 | Most shops will charge 0.5 hours of labor for this simple replacement. |
Replacement Guide
Replacing the tail light assembly on a 1999-2002 Acura RL is a very straightforward job that almost anyone can do with basic tools.
- Difficulty: 1 out of 5 (Very Easy)
- Estimated Time: 15-20 minutes
- Tools Needed: 8mm socket or wrench, trim removal tool (or flat-head screwdriver).
Step-by-Step Instructions
- Access the Assembly: Open the trunk. On the side with the tail light you are replacing, locate the trunk liner. You will need to remove one or two plastic clips to peel the liner back. A trim removal tool is best to avoid breaking them.
- Disconnect Wiring: With the liner pulled back, you will see the back of the tail light assembly. Locate the main electrical connector and unplug it from the vehicle's wiring harness.
- Remove Mounting Nuts: The assembly is held in place by four 8mm nuts on threaded studs. Use your 8mm socket to remove all four nuts. Keep them in a safe place.
- Remove the Assembly: Gently but firmly, pull the tail light assembly straight back, away from the vehicle. It should pop out of the body.
- Install the New Assembly: Installation is the reverse of removal. Guide the new assembly into place, ensuring the studs go through the holes. Hand-tighten the four 8mm nuts, then snug them down with your wrench (do not overtighten). Reconnect the electrical harness, put the trunk liner back in place, and test all light functions.
Frequently Asked Questions
My tail lights and dash lights went out at the same time. Is it the tail light assembly?
Probably not. This is a classic symptom of a blown fuse. Before buying any parts, check the fuse boxes both inside the cabin and under the hood for a fuse labeled "small lamps" or similar. This fuse often controls the tail lights and the instrument panel illumination circuit.
Can I just replace the gasket instead of the whole assembly?
Yes, if the leak is from the main gasket between the assembly and the car body, new gaskets are sometimes available. However, the more common leak point is the seal where the lens is bonded to the housing itself, which is not a separately replaceable part. In this case, sealing the seam with silicone or replacing the assembly is the only solution.
Why do my brake lights work but my tail lights don't?
This is usually due to one of two things. The most common cause is a dual-filament bulb where one of the filaments (the one for the tail light) has burned out while the other (for the brighter brake light) still works. The second cause could be a wiring issue or corrosion on the specific pin for the tail light circuit within the assembly.
Is it legal to drive with a cracked or water-filled tail light?
No. All states require tail lights to be in proper working order and to be red in color. A cracked lens that emits white light or a non-functional light can get you a traffic ticket. A water-filled light is likely to fail soon and should be repaired immediately for safety.
Technical Specifications
OEM Part Numbers: 33551-SZ3-A02 33551-SZ3-A11
Fits Driver Side (Left). 1999-2002 models feature an amber turn signal lens. Assembly is held by four 8mm nuts.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Acura RL:
- 🛍️ Shop This Part
- Is This the Right Part? Amber vs. Clear Turn Signals
- Symptoms of Failure
- 1. Water or Condensation in the Housing
- 2. Dim, Flickering, or Non-Working Lights
- 3. Rapidly Burning Out Bulbs
- 4. Blown Fuses
- Buying a Used 1999-2002 Acura RL Tail Light
- Cost Comparison
- Replacement Guide
- Step-by-Step Instructions
- Frequently Asked Questions
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