Description

1187KL Tail Light Lens for Trucks

The 1187KL Tail Light Lens for Trucks is WAS’s right-side replacement lens for commercial vehicle rear lamp clusters — priced at £5.59, it’s the direct offside fix when the cover is cracked, shattered or degraded past serviceable condition. The cluster housing is intact. The bulbs are fine. This lens is the repair.

Right-side tail lenses take particular punishment on UK roads — the offside is the traffic-facing side on a parked or loading vehicle, exposed to passing vehicles, spray and stone strikes at speed. The WAS 1187KL rear lamp lens fits the right side directly, restores the housing seal and brings the vehicle back into full rear lighting compliance in a single, low-cost part.

What Is the 1187KL Tail Light Lens for Trucks?

The WAS 1187KL is a right-side replacement lens for truck tail light clusters. It replaces the outer cover of the rear lamp assembly — restoring the optically correct, sealed surface that filters and directs light output from the bulbs or LED array inside the housing. Lens replacement is the correct repair when the cluster body and wiring remain intact but the outer cover has cracked, fractured or UV-degraded beyond use.

How the Tail Light Lens Works

The lens does two jobs simultaneously. First, it acts as a colour filter — transmitting the correct red light output required by UK and EU rear lighting regulations for rear position, brake and fog lamp functions. Second, it seals the cluster housing against water ingress, road spray and debris. Crack the 1187KL tail light cover and both functions fail together. Water enters the housing, reaches the bulb holders and terminal contacts, and begins corroding the cluster from inside — silently, progressively, and expensively. The replacement lens closes both failures in one £5.59 part.

Why Truck Tail Light Lenses Fail

Reversing impacts crack rear lenses more reliably than any other cause — the offside tail cluster is directly exposed when a truck reverses into a loading bay, dock or yard barrier. Motorway stone strikes fracture lenses without any perceptible impact at the time — the damage only surfaces on the next pre-departure check. UV degradation yellows and crazes lens plastic progressively over years of outdoor exposure, reducing light transmission below legal thresholds before the lens physically breaks. And on vehicles operating through UK winters, existing UV-crazed lenses fracture completely on the first hard frost — brittleness meets thermal shock and the lens splits.

1187KL Tail Light Lens for Trucks — Full Specifications

1187KL Tail Light Lens for Trucks — Compatibility

The WAS 1187KL right tail lens is specified for right-side offside fitment only. Fitting a right-hand lens to a left-hand cluster produces incorrect optical geometry and prevents the housing from sealing — introducing exactly the water ingress fault you’re trying to rectify. Confirm the failed lens is your offside unit before ordering.

Confirming Fitment

Check the part number on your existing failed lens before purchasing. The 1187KL replacement lens unit is manufactured to fit specific WAS rear cluster models — confirm your cluster manufacturer and reference aligns with the 1187KL specification. Physical comparison of the lens profile against your existing cluster housing gives the most reliable fitment confirmation, especially on older bodywork or vehicles that have had cluster repairs previously.

Cross-Reference Table

When and Why to Replace

1187KL Symptoms — What to Watch For

Cracked or shattered offside lens. The most urgent and most visible fault. A fractured WAS 1187KL truck rear light lens leaves the cluster interior open to water, road grit and direct contact with internal components. Each journey driven on a cracked lens moves the fault closer to a corroded bulb holder and a failed cluster. At £5.59, the 1187KL replacement lens unit costs less than any subsequent repair — fit it now.

Yellowed or optically degraded lens surface. UV degradation reduces light transmission through the lens over time — the bulb or LED fires correctly, but the output through a yellowed cover drops below the minimum intensity required under ECE rear lighting regulations. This is a DVSA-testable defect just as surely as a physical crack. The degradation is gradual enough that many drivers don’t notice until a roadside enforcement check identifies it first.

Water ingress or condensation inside the cluster. Visible moisture inside the rear lamp housing is direct confirmation that the lens seal has failed. The gap or crack causing it may appear minor — but water is already inside and already working on the terminal contacts and bulb holders. Replace the WAS 1187KL rear lamp lens immediately and inspect the internal cluster components for corrosion damage before reinstating.

Fix Truck Tail Light Fault — Replace the 1187KL Lens

No sealant, tape or adhesive repair restores a cracked lens to the optical integrity or housing seal standard required for DVSA inspection. The WAS 1187KL replacement lens unit is the only correct fix. Fit it now at £5.59. The alternative — deferring until water damage forces a full cluster replacement — costs significantly more.

Why Choose the 1187KL Tail Light Lens for Trucks?

Right-Side Direct Fitment — Exact Profile and Housing Seal

The WAS 1187KL is manufactured as a direct replacement for right-side WAS tail clusters — correct lens profile, correct optical geometry, correct seal interface with the cluster housing. A generic lens or incorrect-side fitment won’t seat flush, won’t seal against water ingress and won’t deliver the compliant light distribution pattern required under ECE rear lighting standards. According to WAS’s official replacement parts documentation, their lens range is produced to original cluster specifications — fit, seal and optical output included as standard.

Seals the Cluster Against Year-Round UK Conditions

The lens is the primary waterproofing component for the entire cluster assembly. A correctly seated WAS 1187KL right tail lens restores the housing to its original ingress protection rating — closing out rain, road spray, pressure washing and the freeze-thaw cycles that exploit any existing lens damage. For right-side fitment specifically, where the offside cluster faces oncoming traffic spray and motorway debris, that restored seal directly extends the working life of every component inside the housing.

Act at £5.59 — Before the Cluster Bill Arrives

Water ingress through a cracked tail lens follows a predictable path: corroded bulb holders, failed terminal contacts, dead cluster. The repair cost multiplies at each stage. The DVSA MOT Inspection Manual for HGVs classifies rear lamp lens condition as a testable item — a cracked or non-compliant lens is a chargeable defect at inspection. The 1187KL tail light cover is £5.59. A full cluster replacement is not. The decision makes itself.

Buy 1187KL Tail Light Lens for Trucks Online

At £5.59 with same-day despatch, the WAS 1187KL rear lamp lens is in stock and shipping today across the UK and EU. Genuine WAS replacement stock — correct right-side fitment, correct specification, no pattern substitutes. Order now and clear the defect before your next roadside check, inspection or pre-departure walkaround.

Installing the 1187KL Tail Light Lens for Trucks

Step-by-Step 1187KL Fitting Guide

1. Isolate the vehicle’s electrical system before beginning — particularly where cluster access requires working inside the body or load space.
2. Remove the tail light cluster from its mounting where necessary for lens access — retaining screws or quarter-turn fixings depending on cluster and body type.
3. Undo the retaining screws or release the clips securing the damaged lens to the cluster body.
4. Remove the cracked or degraded lens — inspect the housing seal channel and internal bulb holders for water damage or corrosion before fitting the new lens.
5. Clean the seal channel on the cluster housing thoroughly — remove old sealant residue, debris and any corrosion that would prevent the replacement lens from seating flush.
6. Seat the new WAS 1187KL right tail lens onto the cluster housing — confirm it sits completely flush around the full perimeter before securing.
7. Refit retaining screws or clips — do not overtighten against the plastic lens surround or housing.
8. Refit the cluster to the vehicle if it was removed for access.
9. Restore electrical power and confirm all rear lamp functions illuminate correctly through the new lens.

FAQs

Is the 1187KL a left or right replacement lens? Right side — offside fitment only. For the nearside left-hand position, the correct part is the WAS 1184KL. Confirm your failed lens position before ordering to avoid a return shipment.

Does a cracked tail lens fail an HGV MOT? Yes. A cracked, fractured or optically degraded rear lamp lens is a testable defect under DVSA HGV inspection criteria. The vehicle must have it replaced before presenting for test.

Can I repair a cracked lens with adhesive or sealant? No. Adhesive repairs do not restore optical geometry or housing seal integrity to the standard required for DVSA inspection. Replacement with the correct part number is the only compliant solution.

Is the 1187KL compatible with all WAS tail light clusters? The 1187KL is a right-side lens within the WAS range and fits specific WAS cluster models. Cross-reference your existing lens or cluster part number against the 1187KL before ordering — WAS produce multiple lens profiles across their tail cluster range and not all are interchangeable.  Individual Parts, tail lights

Complete the Service — Related Parts to Check

• Left-side tail light lens — WAS 1184KL (nearside pair)
• Tail light bulb set
• Bulb holder and socket assembly
• Rear lamp cluster housing seal
• Cluster retaining screws and fixings